New ZWO mono camera on the way?

[tooth_dr]

Thanks for the advice and input guys, and despite my stubbornness, I have to concede that the APS-C is more than adequate.  I'll still get a nice increase in FOV, with increased resolution at the same time, compared to my current KAF8300 sensor.

[AnakChan]

1 hour ago, gorann said:

Are you sure it is the same? The one I have screws on to the camera with a set of small screws after removing the tilt plate on the camera.

See here: https://astronomy-imaging-camera.com/tutorials/5-connection-methods-to-get-55mm-back-focus-length.html

Yes, there's only 2 options for the ASI6200MM....the 2"x5 or 2"x7, I have the 2"x7. In this sample pix, it's attached to my Tak µ250CRS instead (which has a smaller imaging circle so vignette on this scope makes sense, but not on the Pentax 125SDP).

[gorann]

22 minutes ago, AnakChan said:

Yes, there's only 2 options for the ASI6200MM....the 2"x5 or 2"x7, I have the 2"x7. In this sample pix, it's attached to my Tak µ250CRS instead (which has a smaller imaging circle so vignette on this scope makes sense, but not on the Pentax 125SDP).

Yes, that is the one. I got worried when you wrote "EFW2" which is something different I think.

[AnakChan]

10 minutes ago, gorann said:

Yes, that is the one. I got worried when you wrote "EFW2" which is something different I think.

This is the vignette I get with the ZWO 2" Lum with the ASI6200MM on the Pentax 125SDP which was surprising. the 125SDP should have an image circle the same as the FSQ106ED. 

[Ken82]

1 hour ago, tooth_dr said:

Surely some vignetting is ok, provided it corrects with flats and doesn’t overly impinge on SNR?

Yes some vignetting is ok and can easily be corrected. 
 

I think some on cloudy nights using 2” filters have mentioned the filter wheel doesn’t move to exactly the same position each time you change filter. Meaning you’ll need to take flats each time. 
 

Ive not found this but i always move the filters forward in the wheel rather than both directions. So Ive only taken one set of flats for each filter and this has worked for me. 
 

The m54 connection on the filter wheel could also cause some vignetting as the internal diameter of the male part is 46+mm. Just keep that in mind if using a fast scope again. I change the connection to go directly to M68. 
 

ken 

[Ken82]

6 minutes ago, AnakChan said:

This is the vignette I get with the ZWO 2" Lum with the ASI6200MM on the Pentax 125SDP which was surprising. the 125SDP should have an image circle the same as the FSQ106ED. 

Could be the m54 connection ? 

[AnakChan]

3 minutes ago, Ken82 said:

Could be the m54 connection ? 

Upgraded to the M68 tilt adapter :D. I'm pretty sure this is due to the ZWO 2" filters, since they're mounted, the actual filter glass itself is less than 2" naturally. But I am surprised at @gorann's 2" mounted Baader not vignetting at all.

[Ken82]

8 minutes ago, AnakChan said:

Upgraded to the M68 tilt adapter :D. I'm pretty sure this is due to the ZWO 2" filters, since they're mounted, the actual filter glass itself is less than 2" naturally. But I am surprised at @gorann's 2" mounted Baader not vignetting at all.

But Gorann is at f7 

[AnakChan]

1 minute ago, Ken82 said:

But Gorann is at f7 

Doh! I missed that...mine's F4.9. So actually thank you. This may prompt me to test by removing my reducer and try native 800mm/F6.4 to see if that helps.

Edited December 2, 2020 by AnakChan

[gorann]

5 hours ago, Ken82 said:

But Gorann is at f7 

Thanks Ken, I was about to ask about the f-ratio😉

[Ken82]

1 minute ago, gorann said:

Thanks Ken, I was about to ask about the f-ratio😉

Just out of interest do you have any sort of tilt adapter ? 
 

I found it absolutely necessary with the fsq 106 but no at all with the fsq 85. Which implies it was likely the adapters on the 106???

[gorann]

Yes, the ASI6200MM comes with a tilt adapter that is moved from the camera to the front of the image train after you add the EFW and OAG. But I have not needed to adjust it.

 

[Ken82]

1 minute ago, gorann said:

Yes, the ASI6200MM comes with a tilt adapter that is moved from the camera to the front of the image train after you add the EFW and OAG. But I have not needed to adjust it.

 

The standard m54 one ? Wow that’s great that caused a massive amount of vignetting for me until changing to m68. 
 

Just shows the difference between the f ratios 👍

I also found the zwo tilt adapter pointless as you’d need to remove the camera to adjust the screws. Gerd Neumann CTU is much better. 

[gorann]

4 minutes ago, Ken82 said:

The standard m54 one ? Wow that’s great that caused a massive amount of vignetting for me until changing to m68. 
 

Just shows the difference between the f ratios 👍

I also found the zwo tilt adapter pointless as you’d need to remove the camera to adjust the screws. Gerd Neumann CTU is much better. 

Yes, what a useless tilt adapter than cannot be adjusted while imaging - happy I did not need to adjust it since f/7 is so forgiving. I save my troubles to my imaging at f/2 with the RASA8.......

[Space Oddities]

Apparently the ASI2600MM mono is coming soon  

[SamAndrew]

excellent, wonder what the price will be; it would be nice if was the same as the colour version, but I'm expecting £2500.

[Space Oddities]

Apparently QHY as well!

 

[tooth_dr]

It’s exciting news 👍🏻

[tooth_dr]

3 hours ago, SamAndrew said:

excellent, wonder what the price will be; it would be nice if was the same as the colour version, but I'm expecting £2500.

I’m expecting the same price as the colour version, but typically mono is a little more. 

[DaveS]

I'm expecting it to be very similar to the colour version. Whatever that will be after the pound tanks.

[Space Oddities]

The QHY one will sell for $2399 apparently ($2099 for early birds)

https://www.facebook.com/QHYCCD/posts/2993999350703328

[nfotis]

Of course, the 'early birds' will be the beta testers, judging by the various bugs unearthed in both QHY and ZWO 294mm offerings being tested by the users at the moment.

N.F.

 

[DaveS]

QHY 268 available to pre-order from Astrograph at a good price.

[SamAndrew]

Very tempting! esentially can get a free filter wheel to go with it. Need new filters as well though 😐

[nfotis]

6 hours ago, SamAndrew said:

Very tempting! esentially can get a free filter wheel to go with it. Need new filters as well though 😐

Yeah, the filter prices are hard to stomach...

Maybe at the end of the year things will be more reasonable.

N.F.