Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Equipment Discussions >> Mounts

Pages: 1 | 2 | (show all)
hoa101
super member
*****

Reged: 02/04/12

Loc: Northern Virginia
Mount for DSLR and 200mm lens or shorter
      #5655156 - 01/31/13 09:57 PM

I'm hoping for some good advice on mounts for DSLR with camera lenses 200mm (f2.8) or less only.

In the future, I plan to work my way up to narrow-band imaging with a 6nm clip-in Ha filter. That would allow me to do some serious imaging right from my heavily LP'ed backyard. Right now I am experimenting with a 50mm lens on my CG-4 and fixed tripods. This lens is both fast and wide enough that accurate tracking is not a concern.

However, I want advice on a mount that will handle longer exposures required when using up to 200mm and a very narrow-band filter. Money is not the object within reason. My goal here is "measure twice, cut once."

Edit: Seems that the longer Ha exposures I want to eventually tackle would almost certainly require guiding. I guess I will have to tailor my choices.

Right now I'm considering: Sirius/HEQ5, IEQ30, Losmandy G8, CG-5 (this one is iffy)

Edited by hoa101 (02/02/13 09:49 AM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
mmalik
Postmaster
*****

Reged: 01/13/12

Loc: USA
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5655626 - 02/01/13 06:16 AM

If I may; I would suggest 'think different'. Try getting a standard (may be low capacity) premium mount (AP, TAK, PM) regardless of the goal. If you are/will be a serious astro-photographer, you'll grow out of your 'just for 200mm' stage quickly. Same goes for your lenses; think a small APO and guided setup instead. Note: You can always piggy your 200mm. Some relevant discussion links below. Sorry, not the exact answer. Thx

Link1...
Link2...
Link3...
Link4...
Link5... [Image: Courtesy of Hiro]


On a side note, some image processing instructions here...; some narrow-angle DSLR image samples here...

Edited by mmalik (02/01/13 06:36 AM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
hoa101
super member
*****

Reged: 02/04/12

Loc: Northern Virginia
Re: Mount for DSLR and 200mm lens or shorter new [Re: mmalik]
      #5655740 - 02/01/13 08:14 AM

Hmmm, not so sure about that. I would have trouble convincing the CEO, CFO, and COO that I need a [large] mount, another telescope, CCD, filters, laptop, battery, etc etc.

However it is pretty easy easy to use the camera, since we've already got more than one.

Edited by hoa101 (02/01/13 08:15 AM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
mmalik
Postmaster
*****

Reged: 01/13/12

Loc: USA
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5655884 - 02/01/13 09:21 AM

Understood. Here... is another discussion; stuff you seem to know already. Thx

Post Extras: Print Post   Remind Me!   Notify Moderator  
andysea
Pooh-Bah
*****

Reged: 09/03/10

Loc: Seattle, WA
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5655916 - 02/01/13 09:35 AM

I love my 200mm f2.8. It's an exceptional lens for AP and I use it wide open.
Here is a recent picture.
http://www.flickr.com/photos/andyinsea/8381119822/in/photostream/
I used the Skymemo, unguided. I've used the it with 300 and 400mm lenses unguided. It can however be guided with an adapter by Shoestring astronomy. I have it but I haven't bothered using it yet.
The polar scope is very accurate.


Post Extras: Print Post   Remind Me!   Notify Moderator  
hoa101
super member
*****

Reged: 02/04/12

Loc: Northern Virginia
Re: Mount for DSLR and 200mm lens or shorter new [Re: andysea]
      #5656265 - 02/01/13 12:26 PM

If you don't mind me asking, there is one question on my mind after reading lots of threads on the Astrotrac and Skymemo.

Specifically, what makes the Skymemo more effective than an Astrotrac in your mind. Removing relative cost from the equation, why is the Skymemo superior?

Thanks, this kind of discussion helps me alot!

Quote:

I love my 200mm f2.8. It's an exceptional lens for AP and I use it wide open.
Here is a recent picture.
http://www.flickr.com/photos/andyinsea/8381119822/in/photostream/
I used the Skymemo, unguided. I've used the it with 300 and 400mm lenses unguided. It can however be guided with an adapter by Shoestring astronomy. I have it but I haven't bothered using it yet.
The polar scope is very accurate.




Post Extras: Print Post   Remind Me!   Notify Moderator  
btb
sage


Reged: 07/07/06

Loc: Northeast Indiana
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5656281 - 02/01/13 12:36 PM

Have you looked at these?
Sky Watcher
Coronado DS


Post Extras: Print Post   Remind Me!   Notify Moderator  
bilgebayModerator
Post Laureate
*****

Reged: 11/06/08

Loc: Turkiye - Istanbul and Marmari...
Re: Mount for DSLR and 200mm lens or shorter new [Re: btb]
      #5656344 - 02/01/13 01:13 PM

Vixen Polarie is the name of the game

Post Extras: Print Post   Remind Me!   Notify Moderator  
andysea
Pooh-Bah
*****

Reged: 09/03/10

Loc: Seattle, WA
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5656602 - 02/01/13 03:38 PM

Well I don't know if the skymemo is superior to the astrotrac. All I can say is that I really like mine. The astrotrac and all other trackers might be better. I just don't know as I havent used any of them.

I just wanted to give an example of a Photo taken with the canon 200 f2.8 and the skymemo:)

Andy


Post Extras: Print Post   Remind Me!   Notify Moderator  
hoa101
super member
*****

Reged: 02/04/12

Loc: Northern Virginia
Re: Mount for DSLR and 200mm lens or shorter new [Re: andysea]
      #5657150 - 02/01/13 09:13 PM

I've been looking alot at the IEQ30, that also seems small enough to be reasonable and an excellent performer. Some of the PE claims are almost too good to be true...

Also, guiding would be an option if that "someday" came around. Alot bigger than a Photoguider, Astrotrac, etc. though.

Edited by hoa101 (02/01/13 09:16 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
Tim C
Pooh-Bah
*****

Reged: 11/11/07

Loc: Marietta, GA
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5657191 - 02/01/13 09:45 PM

I've owned a fair number of mounts when I was imaging (kind of embarrassing to list them but I had fun: meade LX75, CGEM, EM200, Atlas, CG-5, and 2 astrotracs). As evidenced by my two astrotracs, I was also looking for the simple portable solution for imaging with lenses or small refractors on trips and didn't learn my lesson the first time. Believe or not, an astrotrac is more expensive and harder to use than a small GEM mount for anything but the wide angle lenses. The necessary accessories are expensive (you'll get flex even with a Bogen geared head that throws off your polar alignment). plus I just found it hard to point at things and frame, etc. Having go to with a hand controller is MUCH better and YOU WILL WANT AUTOGUIDING especially if doing narrowband. An astrotrac will need perfect polar alignment for long exposures even at 200mm and perfect polar alignment is hard with the astrotrac.

I highly recommend the little CG-5 for what you are trying to do. Get one of the litle orion autoguider 50mm finder guiders and one of the autoguider cameras that don't need a laptop and you will have a simple portable set up with go to and no flex. The new little ioptron mounts look good too.

Here are some shots with the CG5:

California with a 70mm refractor:
http://tcardin.zenfolio.com/p999197637/h2402731#h2402731

Some shots with a 200mm lens:
http://tcardin.zenfolio.com/p999197637/h4880d84#h4880d84
http://tcardin.zenfolio.com/p999197637/h11c3cc6d#h11c3cc6d
http://tcardin.zenfolio.com/p355986048/h197b8822#h197b8822

Here is a 200mm shot with an astrotrac (I used pempro to fine tune polar alignment):

http://tcardin.zenfolio.com/p999197637/h23d1d30e#h23d1d30e


I'm telling ya - small GEM with autoguiding way more effective, easier, and more fun!

Tim


Quote:

I'm hoping for some good advice on mounts for DSLR with camera lenses 200mm (f2.8) or less only.

In the future, I plan to work my way up to narrow-band imaging with a 6nm clip-in Ha filter. That would allow me to do some serious imaging right from my heavily LP'ed backyard. Right now I am experimenting with a 50mm lens on my CG-4 and fixed tripods. This lens is both fast and wide enough that accurate tracking is not a concern.

However, I want advice on a mount that will handle longer exposures required when using up to 200mm and a very narrow-band filter. Money is not the object within reason. My goal here is "measure twice, cut once."

From my research, I have gleaned that I probably do not need auto-guiding, but require a mount that is extremely accurate out-of-the-box. So far the Astrotrac seems to be the strongest contender. However, there is quite a bit of whinging about polar alignment and polar finder that comes with it. Samir really likes his Kenko Skymemo. Then there is the Starlapse which is capable of auto-guiding. Also the ultra-portable mounts like Polarie and Skytracker.

I want to do it right the first time to avoid disappointment later. I'm open to suggestions!




Edited by Tim C (02/01/13 09:49 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
Hikari
scholastic sledgehammer
*****

Reged: 01/05/11

Loc: Maine, USA
Re: Mount for DSLR and 200mm lens or shorter new [Re: Tim C]
      #5657261 - 02/01/13 10:22 PM

My experience is the opposite of Tim's, although I only when up to 120mm with the AstroTrac. I found the GEM just big and a pain--I never really used it. I had an AstroTrac on a geared head and found it easy enough to align. The scope is not as nice as my Takahashi polar scope, but it works. I think if you go to a GEM, it would be better to wait until you start thinking about scopes--the AstroTrac will still be a useful second mount.

However, the Astrotrac was still too big for what I want to do and have just replaced it with a Polarie. The AstroTrac is a more stable mount and can take a larger load. The Vixen polar scope is much nicer through.


Post Extras: Print Post   Remind Me!   Notify Moderator  
hoa101
super member
*****

Reged: 02/04/12

Loc: Northern Virginia
Re: Mount for DSLR and 200mm lens or shorter new [Re: Hikari]
      #5657360 - 02/01/13 11:21 PM

People seem to have issues with the CG-5, including some I know personally. That makes me a little leery - I do not think of it as a long-term solution. Right now I'm leaning towards something more like an IEQ30 or GP2 Photo Guider.

Post Extras: Print Post   Remind Me!   Notify Moderator  
gezak22
scholastic sledgehammer
*****

Reged: 08/15/04

Loc: On far side of moon. Send help...
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5657445 - 02/02/13 12:28 AM

Quote:

... I want to do it right the first time ...




... then you should read my mount history.

I used a CG-5 ASGT for 50mm and 200mm lenses (100mm too, but I found Canon's 100mm f/2 to be a pain for AP). At 200mm (f2.8) things had gotten sketchy even though I was guiding. Broadband work was no problem as long as I kept my exposures to 4min (a good limit for my skies anyway). For narrowband work however (8min subs), I would get slightly elongated stars.

About a year ago, I sold the CG for scrap (multiple parts had failed/died, and I didn't want to deal with Celestron's 'return policy') and I bought a used (~10 years old!!!) GM-8. On the first night out, it worked like a charm, and after upgrading to high precision worms and one part worm blocks, the mount felt like a tank - a MAJOR leap up from the CG5. I then upgraded to a 90mm Tak (12 pounds to total load), and I still get 1" rms guiding error - even in some wind.

1. If you get a CG5, you will need to perform some work to get it performing well. If you can change spark plugs, you are qualified to work on a GEM (but do follow a guide of some sort).
1a. The CG5 is a cheap mount where every corner has been cut to bring down the cost. I found the CG5 frustrating to work on when compared to the GM-8.
2. The GM-8 will need some work to perform really really well.
2a. For worry free AP, the one part worm block (OPWB) is a must on the RA axis. During that upgrade you might as well upgrade to a high precision worm. These upgrades are not mandatory on DEC, though I did them and I recommend it.
2b. With OPWB installed, the GM-8 is put together so well, that adjusting RA and DEC (worm mesh, backlash, ...) is faster than adjusting only one axis on the CG5. Once adjusted, things stay in place and will likely not need any fine tuning for a while.
3. Buy used to save money. My used GM-8 cost me $900 and a 4 hour car trip through LA in Thanksgiving traffic. The CG5 had gotten so frustrating that I remember this car trip as a pleasant experience.
3a. If you go that route, make sure the seller provides you with a representative curve from PHD or some guiding program along with a 100% raw image so you clearly see star shapes.

Having said all that, I have seen some very nice images at 600mm fl from CG5 users. But I find that a lot of CG5 imagers don't post 100% images. I suspect that if they did, you would see elongated stars.

Long story short: I recommend buying a used GM-8 either with a OPWB on the RA axis or doing the upgrade yourself.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Tim C
Pooh-Bah
*****

Reged: 11/11/07

Loc: Marietta, GA
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5657669 - 02/02/13 07:58 AM

That's the thing about the low end chinese mounts... some will have problems with them. My CG5 was pretty decent and no problem at 200mm when guiding. My CGEM (an early one) was very difficult to guide but I was using longer focal lengths so not a fair comparison. Chances are you will be fine at 200mm guiding. Maybe the ioptron would be better unguided but who knows for sure.

Astrotrac is good but expensive option if you're flying. I think you'll be able to do more with a small GEM though including using up to a 80mm refractor. Pretty difficult to get 5 min+ subs on an astrotrac you'll likely need for narrowband.

Don't underestimate the value of go-to when framing objects you can't see.

Quote:

People seem to have issues with the CG-5, including some I know personally. That makes me a little leery - I do not think of it as a long-term solution. Right now I'm leaning towards something more like an IEQ30 or GP2 Photo Guider.




Edited by Tim C (02/02/13 08:12 AM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
hoa101
super member
*****

Reged: 02/04/12

Loc: Northern Virginia
Re: Mount for DSLR and 200mm lens or shorter new [Re: Tim C]
      #5657682 - 02/02/13 08:16 AM

Yeah, the goto issue is something else that I've been thinking about. There is so much stuff to consider. Ugh.

I would feel a little silly buying a Sirius/HEQ5 Pro, GM8, Tak or ieq30-type mount for just camera... but that may be the route I have to go. There is the new SmartEQ Pro, but I do not think there's enough info on it to know if it would suffice (with guiding).

I guess one option I have not thought about is the Losmandy starlapse which can be adapted for guiding. But then I probably may as well have bought a GM8 in the first place.

Quote:

That's the thing about the low end chinese mounts... some will have problems with them. My CG5 was pretty decent and no problem at 200mm when guiding. My CGEM (an early one) was very difficult to guide but I was using longer focal lengths so not a fair comparison. Chances are you will be fine at 200mm guiding. Maybe the ioptron would be better unguided but who knows for sure.

Astrotrac is good but expensive option if you're flying. I think you'll be able to do more with a small GEM though including using up to a 80mm refractor. Pretty difficult to get 5 min+ subs on an astrotrac you'll likely need for narrowband.

Don't underestimate the value of go-to when framing objects you can't see.

Quote:

People seem to have issues with the CG-5, including some I know personally. That makes me a little leery - I do not think of it as a long-term solution. Right now I'm leaning towards something more like an IEQ30 or GP2 Photo Guider.







Edited by hoa101 (02/02/13 08:17 AM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
psandelle
professor emeritus


Reged: 06/18/08

Loc: Los Angeles
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5657893 - 02/02/13 10:48 AM

Love my iEQ30 with a much bigger AP load than a camera and lenses. Light (I can one-hand the mount head), easy to set up, very good polar routine (and, unless you're doing hour-long subs, at the FL's you're talking about, probably all you'll need), and room to grow (I can do visual with an ES 152mm fractor...though that's the distant limit).

I'm, at some point in time, going to use lenses and my Borg guidescope to do some really HUGE FOVs (probably over summer) and the iEQ30'll be a breeze for me to do that with.

Oh, and I've had nothing but good customer service from the iOptron guys.

Paul


Post Extras: Print Post   Remind Me!   Notify Moderator  
hoa101
super member
*****

Reged: 02/04/12

Loc: Northern Virginia
Re: Mount for DSLR and 200mm lens or shorter new [Re: psandelle]
      #5658288 - 02/02/13 02:48 PM

Do you know specifically what separates the mount from a Sirius/HEQ5?

Alot of people say, "HEQ5 is proven, IEQ is a newcomer. Therefore, buy the HEQ5." That comment has some weight, but I've heard good things so far about iOptron's IEQ mounts.

Quote:

Love my iEQ30 with a much bigger AP load than a camera and lenses. Light (I can one-hand the mount head), easy to set up, very good polar routine (and, unless you're doing hour-long subs, at the FL's you're talking about, probably all you'll need), and room to grow (I can do visual with an ES 152mm fractor...though that's the distant limit).

I'm, at some point in time, going to use lenses and my Borg guidescope to do some really HUGE FOVs (probably over summer) and the iEQ30'll be a breeze for me to do that with.

Oh, and I've had nothing but good customer service from the iOptron guys.

Paul




Post Extras: Print Post   Remind Me!   Notify Moderator  
psandelle
professor emeritus


Reged: 06/18/08

Loc: Los Angeles
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5658344 - 02/02/13 03:20 PM

Can't tell you the differences (as I don't have a Sirius/HEQ5), I can only tell you my experiences with the iEQ30...but I got one of the very first ones, and it's been a champ.

Other things I like about it: good HC, GPS, pretty good ASCOM drivers.

Paul


Post Extras: Print Post   Remind Me!   Notify Moderator  
terry59
Post Laureate
*****

Reged: 07/18/11

Loc: Colorado, USA
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5658791 - 02/02/13 07:44 PM

Quote:

Do you know specifically what separates the mount from a Sirius/HEQ5?





I think your choice should be driven by what you want to do with it. Wideband imagng with a DSLR will seldom require subs over 5 minutes where narrowband require much longer subs.

A HEQ5/Sirius with EQMOD is something that will work for a long time to support both wideband and narrowband imaging as long as you don't go over 20-22 lbs of gear. There are plenty of images taken with it to support that position.

Take what you read with the appropriate grains of salt and buy what you can quantify via images as your guide. There is far too much soundbite advise around.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Hikari
scholastic sledgehammer
*****

Reged: 01/05/11

Loc: Maine, USA
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5658861 - 02/02/13 08:23 PM

Quote:

I would feel a little silly buying a Sirius/HEQ5 Pro, GM8, Tak or ieq30-type mount for just camera...




Well, a telescope is just a lens. I started with buying a Takahashi mount with a side by side plate for a camera and guide scope. I hate to think of myself as silly...


Post Extras: Print Post   Remind Me!   Notify Moderator  
Patrick
Postmaster
*****

Reged: 05/16/03

Loc: Franklin, Ohio
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5659044 - 02/02/13 10:37 PM

One mount not mentioned so far is the Vixen GP2. My sample has a PE of +/- 7 arc seconds. The mount and tripod are quite portable. I love mine and use it for scopes up to my c6 sct.

Patrick


Post Extras: Print Post   Remind Me!   Notify Moderator  
pfile
Post Laureate


Reged: 06/14/09

Re: Mount for DSLR and 200mm lens or shorter new [Re: Patrick]
      #5659276 - 02/03/13 01:55 AM

i used an orion skyview pro for quite a while with a 200mm lens. but as others have pointed out, the chinese mounts can have problems and mine did - DEC stiction. i tried to solve it but failed.

also having gotos is pretty important for me. with the SVP it was very hard to center my targets, even using plate solving software. with just a hand controller everything has to be done using dead reckoning. 10m away from the target? hold down the button for 70 seconds at 8x tracking rate. wrong direction? oops. back for 140 seconds.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Patrick
Postmaster
*****

Reged: 05/16/03

Loc: Franklin, Ohio
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5659449 - 02/03/13 07:23 AM

Is goto a requirement? You may want to put the new Celestron VX on your list.

Patrick


Post Extras: Print Post   Remind Me!   Notify Moderator  
hoa101
super member
*****

Reged: 02/04/12

Loc: Northern Virginia
Re: Mount for DSLR and 200mm lens or shorter new [Re: Patrick]
      #5659529 - 02/03/13 08:51 AM

People have raised that point, and I tend to agree. With a 200mm lens all by itself on the mount, framing a dim object will be nearly impossible without goto. Or extremely frustrating at any rate.

I have to admit, I am leaning heavily toward the Orion Sirius mount at this point. It is a touch heavy for my purpose, but has all the features and is a well-proven system. A look on Astrobin proves that beyond any doubt.

I really think some of the new mounts look good, but I'm reluctant to spend that kind of money for them just yet.

Quote:

Is goto a requirement? You may want to put the new Celestron VX on your list.

Patrick




Post Extras: Print Post   Remind Me!   Notify Moderator  
Tim C
Pooh-Bah
*****

Reged: 11/11/07

Loc: Marietta, GA
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5659543 - 02/03/13 09:02 AM

I think the Orion Sirius would be a good choice. Really, unless you are looking for something super portable for longer trips you should go ahead and by a mount in this class (maybe you should go ahead and spring for the Atlas/CGEM although I think the Sirius will perform just a s well for OTAs in the 4 inch refractor class or the smaller RC's for longer focal lengths). You'll wind up there eventually if you like astrophotography at all and in the long run it will be much less expensive to just start there.


Quote:

People have raised that point, and I tend to agree. With a 200mm lens all by itself on the mount, framing a dim object will be nearly impossible without goto. Or extremely frustrating at any rate.

I have to admit, I am leaning heavily toward the Orion Sirius mount at this point. It is a touch heavy for my purpose, but has all the features and is a well-proven system. A look on Astrobin proves that beyond any doubt.

I really think some of the new mounts look good, but I'm reluctant to spend that kind of money for them just yet.

Quote:

Is goto a requirement? You may want to put the new Celestron VX on your list.

Patrick







Post Extras: Print Post   Remind Me!   Notify Moderator  
terry59
Post Laureate
*****

Reged: 07/18/11

Loc: Colorado, USA
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5659592 - 02/03/13 09:35 AM

Quote:


I have to admit, I am leaning heavily toward the Orion Sirius mount at this point. It is a touch heavy for my purpose, but has all the features and is a well-proven system. A look on Astrobin proves that beyond any doubt.





If you get the Sirius and are going to have a laptop hooked up, I highly recommed you use EQMOD instead of the SynScan hnd controller.


Post Extras: Print Post   Remind Me!   Notify Moderator  
mmalik
Postmaster
*****

Reged: 01/13/12

Loc: USA
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5659815 - 02/03/13 11:42 AM

Quote:

Mount for DSLR and 200mm lens or shorter




Most important question will be how long you intend to do 200mm AP; if any bit serious, you'll probably grow out of 200mm phase quickly hence any mounts you get ONLY for this particular setup? Thx


Post Extras: Print Post   Remind Me!   Notify Moderator  
mmalik
Postmaster
*****

Reged: 01/13/12

Loc: USA
Re: Mount for DSLR and 200mm lens or shorter new [Re: mmalik]
      #5659851 - 02/03/13 12:00 PM

These are the tools... (iPad/SkySafari Pro/SkyWire...) I use for night sky navigation, pointing, aligning/sync, framing, etc.; if you need such functionality/convenience, then look for a compatible mount. Thx

Post Extras: Print Post   Remind Me!   Notify Moderator  
gezak22
scholastic sledgehammer
*****

Reged: 08/15/04

Loc: On far side of moon. Send help...
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5659912 - 02/03/13 12:39 PM

Quote:

People have raised that point, and I tend to agree. With a 200mm lens all by itself on the mount, framing a dim object will be nearly impossible without goto. Or extremely frustrating at any rate.

...




I disagree. I am using a 400mm scope without goto and I have found the manual setting circles to be more than sufficient. Simply push-to a bright star near 0 dec and adjust the manual setting circles to read the coordinates of the star. Now push-to your target's coordinates. Done.

Sure, go-to is faster and simpler, but it's not required.


Post Extras: Print Post   Remind Me!   Notify Moderator  
hoa101
super member
*****

Reged: 02/04/12

Loc: Northern Virginia
Re: Mount for DSLR and 200mm lens or shorter new [Re: gezak22]
      #5660467 - 02/03/13 05:53 PM

You underestimate my laziness.

Quote:

I disagree. I am using a 400mm scope without goto and I have found the manual setting circles to be more than sufficient. Simply push-to a bright star near 0 dec and adjust the manual setting circles to read the coordinates of the star. Now push-to your target's coordinates. Done.

Sure, go-to is faster and simpler, but it's not required.




Post Extras: Print Post   Remind Me!   Notify Moderator  
gezak22
scholastic sledgehammer
*****

Reged: 08/15/04

Loc: On far side of moon. Send help...
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5660503 - 02/03/13 06:12 PM

Quote:

You underestimate my laziness.







Seriously though, aligning a go-to mount such that go-tos are accurate is about as time consuming as aligning a push-to mount such that push-tos are accurate. Of course I am assuming that you are imaging at 400mm or less with an 8300 sized sensor or bigger. I guess maybe the GM-8 with its clutchless design may have an unfair advantage over other mounts with a clutch when considering using it as a push-to mount.

And if you are spending all that time focusing your f/2.8 optics (it's a pain in the neck - I've been there), then push-to will not be an issue.

But don't get me wrong, go-to is nice, and if it comes for free with the mount, use it!


Post Extras: Print Post   Remind Me!   Notify Moderator  
pfile
Post Laureate


Reged: 06/14/09

Re: Mount for DSLR and 200mm lens or shorter new [Re: gezak22]
      #5660674 - 02/03/13 08:25 PM

if you use astrotortilla it's very easy to get on your target with a goto mount. just 2 iterations and you're there.

Post Extras: Print Post   Remind Me!   Notify Moderator  
hoa101
super member
*****

Reged: 02/04/12

Loc: Northern Virginia
Re: Mount for DSLR and 200mm lens or shorter new [Re: pfile]
      #5662215 - 02/04/13 05:57 PM

Thanks for the advice everyone, it's been very helpful. I pulled the trigger on a Sirius mount. I do not think I'll be disappointed.

One question though, what type of DC power connector does it come with? Is it a cigarette lighter thing or something strange?


Post Extras: Print Post   Remind Me!   Notify Moderator  
RogerRZ
Whatta you lookin' at?
*****

Reged: 01/09/06

Loc: West Collette, NB, Canada
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5662986 - 02/05/13 07:38 AM

I think you will be pleased with your purchase. If you're like most every other astrophotographer, sooner or later you will want to image at longer focal lengths, and this mount will work well up to at least 1000mm (some go longer, but longer is heavier, so one needs to be careful).

Unless they have changed since I bought my EQ6 Pro (the first cousin once removed to the Sirius), they have a cigarette lighter plug on the end of the power cord.


Post Extras: Print Post   Remind Me!   Notify Moderator  
hoa101
super member
*****

Reged: 02/04/12

Loc: Northern Virginia
Re: Mount for DSLR and 200mm lens or shorter new [Re: RogerRZ]
      #5663203 - 02/05/13 09:56 AM

Yeah, I'm pretty excited. Initially I was going to just go all-out and get the Magnificant Mini SSAG package as well... but I decided to just do unguided stuff for awhile. That way I can take it slow and spend money on other things.

I obtained a used Intel Atom/Win XP netbook on the cheap and have ordered my AGM battery, shoestring USB connector, etcetera. Should be good to go when the mount arrives.


Post Extras: Print Post   Remind Me!   Notify Moderator  
JMW
Pooh-Bah


Reged: 02/11/07

Loc: Nevada
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5664298 - 02/05/13 08:44 PM

I have a red dot finder that mates with the Flash shoe on my DSLR. It is pretty easy pointing the red dot at my target instead of trying to see it on the view finder or the LCD with live view. Once I am in the neighborhood I take 30 second test shots to see how the target matches my framing.

You could also rig up a red dot or telrad to attach to the mounting bracket that is holding the camera.


Post Extras: Print Post   Remind Me!   Notify Moderator  
hoa101
super member
*****

Reged: 02/04/12

Loc: Northern Virginia
Re: Mount for DSLR and 200mm lens or shorter new [Re: JMW]
      #5664378 - 02/05/13 09:48 PM

Samir says you can actually aim a green laser down the viewfinder and it will project out the lens at your target. I think I may try that as long as nobody is imaging in the same location.

Post Extras: Print Post   Remind Me!   Notify Moderator  
gezak22
scholastic sledgehammer
*****

Reged: 08/15/04

Loc: On far side of moon. Send help...
Re: Mount for DSLR and 200mm lens or shorter new [Re: hoa101]
      #5664548 - 02/06/13 01:05 AM

Quote:

Thanks for the advice everyone, it's been very helpful. I pulled the trigger on a Sirius mount. I do not think I'll be disappointed.

One question though, what type of DC power connector does it come with? Is it a cigarette lighter thing or something strange?




Good choice. That mount will serve you very well for a long time.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | (show all)


Extra information
30 registered and 39 anonymous users are browsing this forum.

Moderator:  Dave M, richard7, bilgebay 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 2004

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics