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#1551 karlw

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Posted 08 September 2018 - 08:40 PM

1990s C9.25 Carbon Fiber with Celestron 50 mm RA finder, mounted on An iEQ-45 Pro via ADM dovetail bar. Modified GSO focuser, TV 2” diagonal, TV eyepieces. 

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#1552 Rustler46

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Posted 11 September 2018 - 12:26 AM

Here are some photos of my 1985 Super C8 Plus. The first one shows it on a Losmandy G-11 mount after photographing the 2017 solar eclipse.

C-8 at 2017 Solar Eclipse.jpg

 

I still have the original fork mount with Byers gear drive. The tripod and equatorial wedge are from an earlier Celestron-5. The tripod is sturdy enough to easily support my 185 lb. weight, when I park myself on it sans telescope. Now the fork mount is stored in the C-8's original foot locker trunk.

C-8-1.jpg

 

The next photo shows the C-8 carrying a 200 year old Dollond achromatic telescope from around the year 1810. More about this old spyglass is found in this thread - Adventures With a 200 Year Old Dollond Achromat.

C-8 with Dollond-00486.jpg

 

Finally here are some photos taken with this 33 year old SCT. First is the Needle Galaxy (NGC 4565), C-8 with f/7 focal reducer, 1420mm, Sony NEX-5N, 2-1/2 hours total exposure at ISO 1600.

C-8 Photo of NGC 4565.jpg

 

Next is the Helix Nebula (NGC 7293), C-8 with f/7 focal reducer, 1420mm, Sony NEX-7, 4-1/3 hours total exposure at ISO 800.

C-8 Photo of NGC 7293.jpg


Edited by Rustler46, 11 September 2018 - 02:37 AM.

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#1553 Freezout

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Posted 11 September 2018 - 04:32 AM

Rustler it's awesome. The couple of centuries-old refractor & classical modern reflector is splendid just to look at. And the pictures are at the same level.



#1554 Rustler46

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Posted 12 September 2018 - 01:04 AM

Rustler it's awesome. The couple of centuries-old refractor & classical modern reflector is splendid just to look at. And the pictures are at the same level.

Thanks for the kind comment. It was very interesting looking at doubles through that old glass. It has about 16X magnification (measured exit pupil divided into the 40 mm aperture). The field of view is a bit over 1/2 degree. So the Moon fits in with some room to spare. The view is quite greenish due to the color of the crown glass. Sort of like the glass in an old Coke bottle. But the achromatic lens worked as designed with no color fringes. The focal-ratio is around f/18.

 

Without a star diagonal viewing objects very far above the horizon was tough on the neck and back. But then it was meant to be a gentleman's spyglass and not an astronomer's tool. Even with the low magnification the closest double I could discern was Beta Monocerotis at 7 arc-seconds. Of course having the benefit of being carried on a go-to mount (Losmandy G-11) was a huge advantage. But using this old telescope shows how far we have come and what the early pioneers in astronomy experienced. Using a modern APO refractor like my Astro Tech AT115EDT provides an interesting comparison. We have really got it good nowadays.


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#1555 Freezout

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Posted 12 September 2018 - 02:36 AM

(...)  We have really got it good nowadays.

I have been reading the link you gave with explanations and it's quite fascinating indeed. Regarding your last comment, it's crazy to think that the major astronomers who made huge scientific discoveries would have probably given away a leg, to use a basic modern telescope qualified as trash, lemon or dog by many people.

However they would probably prefer the quality of their old sky...

Sorry for the off topic people! Continue to post nice pictures of catadioptric telescopes! 


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#1556 Rustler46

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Posted 12 September 2018 - 04:08 AM

I have been reading the link you gave with explanations and it's quite fascinating indeed. Regarding your last comment, it's crazy to think that the major astronomers who made huge scientific discoveries would have probably given away a leg, to use a basic modern telescope qualified as trash, lemon or dog by many people.

However they would probably prefer the quality of their old sky...

Sorry for the off topic people! Continue to post nice pictures of catadioptric telescopes! 

Thanks for the comments and reminder of this thread's topic. I'll post another photo of my Celestron-8 SCT. This time there's a different refractor along for a ride.

C-8 w- AT115EDT-00944.jpg

 

The tag-along refractor is an Astro Tech AT115EDT triplet APO refractor. It is interesting to compare the view through the two telescopes. One isn't better, they are more complimentary. But having both carried by my Losmandy G-11 mount on a permanent pier is a real plus. It is quick setup, polar aligned and can be controlled by my iPad using SkySafari. Recently I've been using a Celestron-11 with the same APO refractor. I'll post some photos of that combo.


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#1557 Rustler46

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Posted 12 September 2018 - 04:42 PM

Here are some photos of my 1985 Super C8 Plus. The first one shows it on a Losmandy G-11 mount after photographing the 2017 solar eclipse.

attachicon.gif C-8 at 2017 Solar Eclipse.jpg

 

I still have the original fork mount with Byers gear drive. The tripod and equatorial wedge are from an earlier Celestron-5. The tripod is sturdy enough to easily support my 185 lb. weight, when I park myself on it sans telescope. Now the fork mount is stored in the C-8's original foot locker trunk.

attachicon.gif C-8-1.jpg

 

The next photo shows the C-8 carrying a 200 year old Dollond achromatic telescope from around the year 1810. More about this old spyglass is found in this thread - Adventures With a 200 Year Old Dollond Achromat.

attachicon.gif C-8 with Dollond-00486.jpg

 

Finally here are some photos taken with this 33 year old SCT. First is the Needle Galaxy (NGC 4565), C-8 with f/7 focal reducer, 1420mm, Sony NEX-5N, 2-1/2 hours total exposure at ISO 1600.

attachicon.gif C-8 Photo of NGC 4565.jpg

 

Next is the Helix Nebula (NGC 7293), C-8 with f/7 focal reducer, 1420mm, Sony NEX-7, 4-1/3 hours total exposure at ISO 800. This images shows almost none of the dreaded "black drop effect".

attachicon.gif C-8 Photo of NGC 7293.jpg

Here are some other photos showing my Celestron-8 when used in solar/planetary imaging:

C-8 Mercury Transit-00095.jpg

This shows the C-8 set up for imaging at a log landing above a clearcut in the Oregon Coast Range Mountains. The event was the 2016 transit of Mercury. The filter is a Baader Planetarium white light filter.

 

C-8 Mercury Transit-20160509.jpg

The above composite image shows part of the 2016 transit of Mercury, C-8, f/7, 1420mm, Sony NEX-5N, ISO 200, 1/4000-second.

 

C-8 Venus Transit-1.jpg

This one shows the transit of Venus in 2012, 2030mm f/10, Sony NEX-5N, ISO 1600, 1/2500-second. This photo, captured just after 2nd-contact, shows little of the dreaded "black-drop effect".

 

C-8 2012 Annular Solar Eclipse-7314.jpg

This photo shows part of the 2012 annular solar eclipse, C-8, f/10, 2030 mm, Sony NEX-5N, ISO 3200, 1/2500-second. The C-8 did a good job of resolving some details in the sunspots as well as some lunar mountains shown in profile along the Moon's limb.

 

C-8 Jupiter 5-1-17.jpg

The above shows Jupiter on May 1, 2017, C-8 f/20 4060mm, ZWO ASI290MC video camera, best 1553 of 6212 frames stacked.

 

These C-8s are versatile telescopes for both visual and photographic use.


Edited by Rustler46, 13 September 2018 - 01:03 AM.

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#1558 James Paulson

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Posted 17 September 2018 - 06:37 PM

Picked up this Ultima 8 used last week. It came with the dovetail bar. The finder ring is cracked and I have to do some add-ons as I go along, but after waiting 40 years, I can finally say I own a C8, and it will work great on my EQ6 mount..

 

 

C8_small.jpg

 

 


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#1559 bbqediguana

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Posted 17 September 2018 - 08:14 PM

Picked up this Ultima 8 used last week. It came with the dovetail bar. The finder ring is cracked and I have to do some add-ons as I go along, but after waiting 40 years, I can finally say I own a C8, and it will work great on my EQ6 mount..

 

 

attachicon.gif C8_small.jpg

Is that a Chevy Celebrity in the background?!



#1560 James Paulson

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Posted 18 September 2018 - 01:51 PM

Is that a Chevy Celebrity in the background?!

Yes it is. Low miles and all. I drive it on nice warm summer days and keep it as a spare car. It was my grandmothers car before she passed away. Believe it or not you can pack a ton of astronomy gear in one of these things. I also have an 86 Chevy G20 van that I call my "warm room". I am a collector of fine "junk" LOL


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#1561 bbqediguana

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Posted 18 September 2018 - 06:49 PM

Yes it is. Low miles and all. I drive it on nice warm summer days and keep it as a spare car. It was my grandmothers car before she passed away. Believe it or not you can pack a ton of astronomy gear in one of these things. I also have an 86 Chevy G20 van that I call my "warm room". I am a collector of fine "junk" LOL

So cool! My 3rd car was an '88 Celebrity and I used to haul my astro gear with it. Now I use my '07 Jetta which is almost as spacious in the trunk department. Glad to see an 80's classic is still getting some use!



#1562 Toddeo

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Posted 18 September 2018 - 07:27 PM

Chevy Celebrity a "Classic"??????????   I had two of them when money was tight and raising the kids. Gee, maybe I ought to have kept them!


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#1563 Chris Cook

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Posted 19 September 2018 - 08:14 PM

Here's my C8 from c1986.  It was originally part of a Super Polaris C8 package Celestron was selling back then.  This photo was taken in 2000.  Sold the scope years ago. 

 

 

selfportrait-1.jpg


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#1564 Stargazer3236

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Posted 20 September 2018 - 03:46 PM

Everyone needs to hold onto their C8 telescopes, mostly in orange color. They will become antiques some day. I have the orange metal speckled Nexstar C8 that I plan on keeping, even if I don't use it anymore.


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#1565 Nippon

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Posted 20 September 2018 - 05:01 PM

Everyone needs to hold onto their C8 telescopes, mostly in orange color. They will become antiques some day. I have the orange metal speckled Nexstar C8 that I plan on keeping, even if I don't use it anymore.

Well the original orange tubes are antiques already. I have a 70s era C8 and it has well figured optics but is noticeably out performed by My Edge 8 so the Edge sees the stars and the old orange tube decorates the guest bedroom.


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#1566 payner

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Posted 21 September 2018 - 07:33 PM

And the black designed ones from the Halley Comet in the mid-1980s are antiques.  I suppose even the Meade LX200GPS units will soon be antiques (if 25 years is the criterion).

 

Randy 



#1567 Foundationer

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Posted 22 September 2018 - 06:39 AM

Meade 12 and C8 cooling for a night of observing!

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#1568 Bomber Bob

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Posted 22 September 2018 - 12:11 PM

My Vixen VMC200L on a Takahashi EM-1S + Filotecnica surveyor tripod:

 

VMC200L S01 - EM-1S Mount.jpg


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#1569 Foundationer

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Posted 24 September 2018 - 06:29 PM

The Meade 12 just got some new toys so I thought I'd post it again!

You gotta love new toysgrin.gif

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#1570 punk35

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Posted 24 September 2018 - 08:02 PM

My second cat, an orange C90. It looks so cute sitting on the c11. It should make a nice g&g/ travel scope. Ignore the temporary mounting solution 😁

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#1571 Rustler46

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Posted 26 September 2018 - 02:36 AM

Thanks for the comments and reminder of this thread's topic. I'll post another photo of my Celestron-8 SCT. This time there's a different refractor along for a ride.

attachicon.gif C-8 w- AT115EDT-00944.jpg

 

The tag-along refractor is an Astro Tech AT115EDT triplet APO refractor. It is interesting to compare the view through the two telescopes. One isn't better, they are more complimentary. But having both carried by my Losmandy G-11 mount on a permanent pier is a real plus. It is quick setup, polar aligned and can be controlled by my iPad using SkySafari. Recently I've been using a Celestron-11 with the same APO refractor. I'll post some photos of that combo.

Here are some photos of my Celestron-11 which I've had since 2008:

C-11 + G-11 + REM.jpg

This shows yours truly after unboxing the new C-11 with Losmandy G-11 mount.

 

C-11 and AT115EDT-00963.jpg

This one shows the C-11 on a permanent pier with Astro-Tech AT115EDT triplet APO on top.

 

C-11 + M51.jpg

M-51 photo through C-11, f/7.1, 1985mm, Sony NEX-5N ISO 1600, 12 5-minute exposures

 

I had this telescope up for sale until I learned of an easier way to get the OTA up on the G-11's saddle:

C-11 Easy Mount.jpg

 

Now I am keeping this big SCT as it is a nice complement to my 115mm APO. As for the Celeston-8, It might do well reattached to its fork mount for a more portable telescope.


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#1572 CSG

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Posted 26 September 2018 - 02:58 PM

Here's my C6 on a recently sold GP mount.  I'm looking at Alt-Az mounts for it but it currently shares the Manfrotto 501/Manfrotto 055cx mount I use with my spotting scope.

 

32603763954_6dae007873_b.jpg

 

Honestly, I don't use it much but the OTA was inexpensive enough that I wanted to have it in case I needed a little more aperture. 


Edited by CSG, 26 September 2018 - 05:13 PM.

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#1573 jgraham

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Posted 29 September 2018 - 04:52 PM

I was lucky to grab this wonderful example of a late production LXD75 SN8 off of the CN Classifieds. Apparently, the original owner replaced the focuser with a Moonlite, eventually parted out the focuser when he retired the scope and stored the OTA in his observatory where mud dobbers decided to nest inside the tube. The scope arrived yesterday and I had a chance this morning to take the scope completely apart, clean it, and put it back together using a few spare parts from another SN8. As you might expect, the mud dobber mud was everywhere inside the tube, but most if it came off under running water. Mud on the secondary caused a little bit of damage to the coating along one edge, but not enough to having any noticeable effect, and the primary just had a few minor scratches on it. Fortunately, I was able to find the original focuser from my imaging SN8 and it fit this one fine. However, I went ahead and placed an order for a Moonlite. I plan on using this scope primarily for visual, but having the Moonlite will give me the option of using it for imaging as well. I replaced the original straight-thru finder with a 50mm RACI for star-hopping and I already have an Astrozap flexible dew shield for it. The mount is from my original LXD75 N6 with a second weight from another LXD75.

 

So, it came together fine and should see first-light later this evening.

 

Fun stuff!

 

LXD75 SN8v (9-29-2018)-2.jpg

 

P.S.

 

First-light was a success! I used a 26mm QX and an 18mm UWA to star-hop from Perseus up through Cassiopeia and over to Andromeda. I didn't bother turning on the mount, I just lightly snugged the clutches and used it manually. All I need to make it complete is to set up my Starbound chair! :)


Edited by jgraham, 29 September 2018 - 09:36 PM.

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#1574 Steve C.

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Posted 02 October 2018 - 11:27 AM

Cat on a CAT.

 

catcat.jpg


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#1575 Simon B

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Posted 07 October 2018 - 06:43 PM

VMC200L on CG4

 

 

IMG 0075B

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