ZWO 2" Filters and ASI6200 - not 100% coverage

Focusers, Filters, Barlows etc..

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RoySalisbury
Posts: 44
Joined: Sat Oct 15, 2016 4:43 am

ZWO 2" Filters and ASI6200 - not 100% coverage

Post by RoySalisbury » Tue May 12, 2020 5:42 pm

I finally got my ASI6200 camera package (FW, filters, oag, ect) and am disappointed in the shipped filters. They DO NOT cover the entire chip. There are noticeable shadows on the corners, and visible rings on the edges. The 2" filters in the holders is just a bit two small. These should have been 50mm unmounted filters for this FW and camera combination.

Does ZWO have a plan to address this? I would suggest that ZWO offer a replacement set for the 2" filters (a swap). Selling this camera with these filters is a dishonest service to the customer who expects all the pieces to work together.

Roy

Moson
Posts: 205
Joined: Wed Apr 01, 2020 8:28 am

Re: ZWO 2" Filters and ASI6200 - not 100% coverage

Post by Moson » Wed May 13, 2020 9:34 am

Sorry about this, that's because the 2“ filters have metal frame. And the size of metal frame is 50mm, so the actual size of the filter is only 48mm.
So, when you use 2" filters on a full frame cameras, it's normal to see shadows on the corners.

RoySalisbury
Posts: 44
Joined: Sat Oct 15, 2016 4:43 am

Re: ZWO 2" Filters and ASI6200 - not 100% coverage

Post by RoySalisbury » Wed May 13, 2020 5:21 pm

I was say it's not "normal" to sell things that are known to have issues. Especially in this market where image perfection is the key. It should have shipped with 50mm (or 68mm) UNMOUNTED filters. It went out with 2" mounted filters because someone was lazy when they bundled the system together.

How can I return JUST THE FILTERS for a refund?

Moson
Posts: 205
Joined: Wed Apr 01, 2020 8:28 am

Re: ZWO 2" Filters and ASI6200 - not 100% coverage

Post by Moson » Thu May 14, 2020 6:39 am

We are very sorry about this! We have the size map of the filter on our website. And we suggest that you mount the filter closer to the sensor to reduce the vignetting/shadows. And we have to say sorry again that the filters can not be returned.

RoySalisbury
Posts: 44
Joined: Sat Oct 15, 2016 4:43 am

Re: ZWO 2" Filters and ASI6200 - not 100% coverage

Post by RoySalisbury » Thu May 14, 2020 7:33 am

I cant mount the filters closer to the camera sensor .. It's YOUR FILTER WHEEL. It can't get any closer.

Moson
Posts: 205
Joined: Wed Apr 01, 2020 8:28 am

Re: ZWO 2" Filters and ASI6200 - not 100% coverage

Post by Moson » Fri May 15, 2020 4:04 am

Maybe you could calibration the vignetting/shadows by the flat frames.

Ken82
Posts: 25
Joined: Thu Jan 31, 2019 11:36 pm

Re: ZWO 2" Filters and ASI6200 - not 100% coverage

Post by Ken82 » Sat Jun 13, 2020 12:49 am

RoySalisbury wrote:
Thu May 14, 2020 7:33 am
I cant mount the filters closer to the camera sensor .. It's YOUR FILTER WHEEL. It can't get any closer.
I also had this problem Roy and had to swap the mounted filters for 50mm unmounted. This is a big problem for anyone using an f5 scope or faster. I complained to my vendor that this camera shouldn’t be sold with these filters or at least advised to use 50mm before purchasing.

It’s not just a matter of correcting the shadow with flats. If a star is reflecting off the metal filter mount you will get substantial reflections.

Maybe zwo can pay the beta testers lol 😆

Ken82
Posts: 25
Joined: Thu Jan 31, 2019 11:36 pm

Re: ZWO 2" Filters and ASI6200 - not 100% coverage

Post by Ken82 » Sat Jun 13, 2020 12:51 am

RoySalisbury wrote:
Thu May 14, 2020 7:33 am
I cant mount the filters closer to the camera sensor .. It's YOUR FILTER WHEEL. It can't get any closer.
I also had this problem Roy and had to swap the mounted filters for 50mm unmounted. This is a big problem for anyone using an f5 scope or faster. I complained to my vendor that this camera shouldn’t be sold with these filters or at least advised to use 50mm before purchasing.

It’s not just a matter of correcting the shadow with flats. If a star is reflecting off the metal filter mount you will get substantial reflections.

Maybe zwo can pay the beta testers lol 😆
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RoySalisbury
Posts: 44
Joined: Sat Oct 15, 2016 4:43 am

Re: ZWO 2" Filters and ASI6200 - not 100% coverage

Post by RoySalisbury » Sat Jun 13, 2020 2:32 am

Ken82 wrote:
Sat Jun 13, 2020 12:51 am
I also had this problem Roy and had to swap the mounted filters for 50mm unmounted. This is a big problem for anyone using an f5 scope or faster. I complained to my vendor that this camera shouldn’t be sold with these filters or at least advised to use 50mm before purchasing.

It’s not just a matter of correcting the shadow with flats. If a star is reflecting off the metal filter mount you will get substantial reflections.
I also had the reflection issues. Could not figure out what it was. I tried everything. Eventually when I got my new Chroma filters (50mm unmounted) ,all my problems went away. And wow.. these are excellent filters. Costly, by worth it. I'll try selling my ZWO filters on astromart .. but doubt anyone would want them.

Ken82
Posts: 25
Joined: Thu Jan 31, 2019 11:36 pm

Re: ZWO 2" Filters and ASI6200 - not 100% coverage

Post by Ken82 » Sat Jun 13, 2020 10:37 am

I also had the reflection issues. Could not figure out what it was. I tried everything. Eventually when I got my new Chroma filters (50mm unmounted) ,all my problems went away. And wow.. these are excellent filters. Costly, by worth it. I'll try selling my ZWO filters on astromart .. but doubt anyone would want them.
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Can you not contact your vendor as I think it’s wrong these filters are sold with this camera ? Who did you buy it from ? For me First light optics FLO had no problem at all changing to the larger 50mm. Still waiting for my chroma to arrive.

For anyone reading this it’s only an issue if your using a scope that is F5 or faster.

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