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WO RedCat 51: comments, observations, opinions and suggestions

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218 replies to this topic

#176 Paulimer

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Posted 15 December 2019 - 10:14 AM



Anyone tested the RedCat with a FF camera like the 6d? I wonder how vignetting and field curvature plays out in real life.

You can refer to my images taken with 810A for reference.

 

get.jpg?insecure

 

get.jpg?insecure

 

get.jpg?insecure


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#177 WoodlandsAstronomer

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Posted 22 January 2020 - 01:59 PM

Any thoughts on preferred mounts? I would like to purchase two new mounts for my redcat'ing...

 

1) a portable mount for traveling (not really sure of any consensus leaders here)

2) a substantive mount for home use that can also support my larger OTAs (leaning towards Skywatcher EQ6-R)

 

Thoughts? Thanks in advance. 



#178 213Cobra

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Posted 22 January 2020 - 09:05 PM

I use this:

 

RC51-BZ4.jpg

 

The mount is a compact but very robust alt-az by Sergio Bonilla (he advertises here and on AM), on a Gitzo Series 5 carbon fiber tripod. Stable, not shaky, self-damping when necessary. The same can easily handle my FSQ-106ED alone or the weighty FSQ with another scope. I also have a DM6 on a Berlebach Planet for my Tak Epsilon but that's certainly overkill for a RedCat 51.

 

Phil


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#179 RobertPettengill

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Posted 22 January 2020 - 09:37 PM

What do you want the mount for?  Astro? Terrestrial? Photo? Visual?

 

I do a lot of imaging so I use a Vixen Polarie tracking mount.  The Vixen multi mounting block and polar scope work perfectly with the Sky-Watcher Star Adventurer wedge, L-bracket, and counterweight. At a tiny fraction of the cost of Vixen parts. 

 

WORedCatVixenMount.jpg

 

This combo tracks well enough for 60" exposures with the RedCat 51.  Works for tracked visual but I carry a ball head too.  I use the Davis & Sanford near home and have Zomei carbon fiber tripod that folds to less than 18" for when it all has to fit in my carry on.

 

;rob

 

Any thoughts on preferred mounts? I would like to purchase two new mounts for my redcat'ing...

 

1) a portable mount for traveling (not really sure of any consensus leaders here)

2) a substantive mount for home use that can also support my larger OTAs (leaning towards Skywatcher EQ6-R)

 

Thoughts? Thanks in advance. 


Edited by RobertPettengill, 22 January 2020 - 09:39 PM.

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#180 outlierrn

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Posted 23 January 2020 - 03:15 AM

Any thoughts on preferred mounts? I would like to purchase two new mounts for my redcat'ing...

 

1) a portable mount for traveling (not really sure of any consensus leaders here)

2) a substantive mount for home use that can also support my larger OTAs (leaning towards Skywatcher EQ6-R)

 

Thoughts? Thanks in advance. 

I don't know from consensus, but I just picked up one of these, and it's worth a look. 

 

https://www.peakdesi...=29420893274156

 

One of the lightest and most compact real tripods you can find.

 

P1012924.jpg

P1012925.jpg

 

I took this with a camera lens almost twice the FL and weight of the Redcat.  Of course, the butterflies look like crap reduced enough for this forum.

 

P1011933.jpg

 

I wouldn't try any serious astrophotography with it, but it'd probably handle milky way or moon shots with an Omegon lx2.


Edited by outlierrn, 23 January 2020 - 03:16 AM.

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#181 WoodlandsAstronomer

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Posted 23 January 2020 - 11:33 AM

I don't know from consensus, but I just picked up one of these, and it's worth a look. 

 

https://www.peakdesi...=29420893274156

 

One of the lightest and most compact real tripods you can find.

 

attachicon.gifP1012924.jpg

attachicon.gifP1012925.jpg

 

I took this with a camera lens almost twice the FL and weight of the Redcat.  Of course, the butterflies look like crap reduced enough for this forum.

 

attachicon.gifP1011933.jpg

 

I wouldn't try any serious astrophotography with it, but it'd probably handle milky way or moon shots with an Omegon lx2.

Thanks and great poster on the wall back there, great movie



#182 WoodlandsAstronomer

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Posted 23 January 2020 - 11:35 AM

What do you want the mount for?  Astro? Terrestrial? Photo? Visual?

 

I do a lot of imaging so I use a Vixen Polarie tracking mount.  The Vixen multi mounting block and polar scope work perfectly with the Sky-Watcher Star Adventurer wedge, L-bracket, and counterweight. At a tiny fraction of the cost of Vixen parts. 

 

WORedCatVixenMount.jpg

 

This combo tracks well enough for 60" exposures with the RedCat 51.  Works for tracked visual but I carry a ball head too.  I use the Davis & Sanford near home and have Zomei carbon fiber tripod that folds to less than 18" for when it all has to fit in my carry on.

 

;rob

Thanks, I'll use the redcat strictly for AP on the go, will try it out unguided to see how well it does and may move up to a guided solution, so will need a mount that could go guided...


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#183 digitalmagic

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Posted 03 February 2020 - 02:46 PM

I just got back from daytime testing some eyepieces in my RedCat 51

We tested a Burgess TMB 7mm, an Edmond Scientific 4.7mm and a Svbony 4mm Aspheric

All eyepieces came to focus and provided pleasing views

Then we added a 2x Barlow - a TeleVue I think, not mine - and it would not come to focus at all

Lastly we tried a TeleVue 2.5x Powermate and it came to focus with all of the above eyepieces

We were looking at people in the enclosed observation deck of the Empire State building from 1.25 miles away

With the 4mm in the 2.5x Powermate that is 156x and the image held up although shake from traffic on 6 Ave was very noticeable

I was very surprised at the image from the Svbony 4mm Aspheric

I got it for $13 just to get an indication as to whether it might be worth investing in a better short lens but I don't think I need another at that focal length although it feels like sacriledge putting a $13 eyepiece into a $1K (after shipping and duty) telescope



#184 WoodlandsAstronomer

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Posted 07 February 2020 - 06:17 PM

Just got a back order notice saying they won’t be shipping until March. So no redcat for me for a while :(

#185 Steve Allison

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Posted 07 February 2020 - 07:08 PM

My Svbony 4mm and 10mm Aspherics are wonderful performers considering how little they cost. My Takahashi 4mm Hi-ortho is better but will not come to focus in my f/15 Brandon 3 inch refractor. The Svbony will, and I don't feel short-changed.



#186 SimonMiller

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Posted 13 February 2020 - 08:23 AM

With a few months down the road and now With V2 version (red or silver) how does it work with a FF DSLR? How would it compare to some of their other scopes that have bigger aperture in APO or normal e.g. 61, 71 81 etc.?


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#187 RobertPettengill

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Posted 13 February 2020 - 04:30 PM

With a few months down the road and now With V2 version (red or silver) how does it work with a FF DSLR? How would it compare to some of their other scopes that have bigger aperture in APO or normal e.g. 61, 71 81 etc.?

It works fine with a full frame camera.  There is significant vignetting, but it is correctable with flats or vignetting compensation in your processing if you are using the whole field.  An APS size sensor will have almost no vignetting.

 

;rob


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#188 Delta608

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Posted 13 February 2020 - 04:41 PM

It works fine with a full frame camera.  There is significant vignetting, but it is correctable with flats or vignetting compensation in your processing if you are using the whole field.  An APS size sensor will have almost no vignetting.

 

;rob

    You have a great website....Thank-you for your hard work and dedication...



#189 RobertPettengill

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Posted 14 February 2020 - 01:55 AM

Here is a single frame RedCat image from a light polluted location with levels tweaked to emphasize the vignetting from a Sony a7iii full frame camera: 

 

RedCatVignette.jpg


Edited by RobertPettengill, 14 February 2020 - 01:56 AM.

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#190 WoodlandsAstronomer

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Posted 14 February 2020 - 02:21 AM

Here is a single frame RedCat image from a light polluted location with levels tweaked to emphasize the vignetting from a Sony a7iii full frame camera:

RedCatVignette.jpg


That’s my exact rig too. Dang, disappointing. How’d your m42 turn out?

#191 GraySkies

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Posted 14 February 2020 - 07:42 AM

I just posted a video review of the RedCat 51 which I've been using for almost 1 year (~10 months)

 

RedCat51 Thumbnail CNFWEB.jpg

Trifid Widefield SNP 1 to 1 CNFWEB.jpg

Andromeda Stretched SN Edit CNFWEB.jpg

https://www.youtube....is3RN_Du585BNoY


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#192 WoodlandsAstronomer

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Posted 14 February 2020 - 03:18 PM

I just posted a video review of the RedCat 51 which I've been using for almost 1 year (~10 months)

RedCat51 Thumbnail CNFWEB.jpg

Trifid Widefield SNP 1 to 1 CNFWEB.jpg

Andromeda Stretched SN Edit CNFWEB.jpg

https://www.youtube....is3RN_Du585BNoY


Enjoyed the review, excellent points about the wildlife aspects. Never understood why they market it that way. It’s a wide field astrograph, and that’s enough.

#193 RobertPettengill

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Posted 14 February 2020 - 03:57 PM

That’s my exact rig too. Dang, disappointing. How’d your m42 turn out?

It's about what I expected, the image circle for the Redcat is 44mm, just barely larger than the corner to corner distance of a full frame sensor.  With vignetting correction the corners are useable as long as your main subject isn't in them.  If you want a perfect frame right out of the camera APS-C is the way to go with this and probably any scope with a 2" draw tube.

 

I'm a planetary imager and still learning DSO processing, so my final results probably don't live up to the potential of the data.  Star shapes are near perfect except in the extreme corners, but even there they are much better than with my vintage Nikkor ED 180 and 300 mm lenses.  Here are some results from my light polluted Bortle 6+ skies.  Note that these were taken under light polluted skies with the moon about 45 deg away, there  is no IR mod on the camera, and I'm using a lightweight Vixen Polarie mount.

FlameAndHorsehead200104.jpg

 

Pleiades201004Ave 1600s.jpg


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#194 HaroldC3

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Posted 24 February 2020 - 07:44 PM

Anyone looking for a Spacecat, these folks have a couple in stock as of today.  I placed a small order with them recently and it went off without a hitch.

 

https://milehighastr...space-cat-scope



#195 smez

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Posted 15 April 2020 - 07:30 AM

I am new to using the WO RC51 and tried to focus in on Orion and was not able to get close using just the scope and my Canon dlsr, what am I missing here? 



#196 RandyD

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Posted 15 April 2020 - 12:27 PM

Just recently bought the SpaceCat 51.    This image was taken last night with my Nikon D5300.    9 x 120 sec. at ISO 800.      Assembled in PI with only STF and DBE.    This seems to be a pretty powerful little scope.....love it!

Randy

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#197 Scott_AstroSweden

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Posted 10 May 2020 - 07:37 AM

Just recently bought the SpaceCat 51.    This image was taken last night with my Nikon D5300.    9 x 120 sec. at ISO 800.      Assembled in PI with only STF and DBE.    This seems to be a pretty powerful little scope.....love it!

Randy

Awesome!!! Just recieved my redcat and hoping for something like this ;) Just diving into PI myself...



#198 RobertPettengill

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Posted 11 May 2020 - 04:29 PM

The Mothers’ Day Moon in HDR with the RedCat:

https://www.flickr.c...eposted-public/


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#199 RobertPettengill

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Posted 11 May 2020 - 04:34 PM

The current issue of Astronomy Technology Today has my review of the RedCat:

https://astronomytec...ume-14-issue-4/


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#200 davidparks

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Posted 12 May 2020 - 08:03 PM

Perfectly Portable - Live Stack Imaging

 

Redcat 51 / AZGTi
 
Redcat 51 / AZGTi

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