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Old 07-10-2020, 10:21 AM
DRCORTEX (Lance)
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Image Train and 2" Filters - 8" SCT

Hi,

I have setup the image train shown, which is exactly 105mm with an F/6.3 reducer, and ASI 294MC Pro camera.

I want to connect a 2" Optolong Pro filter, but don't seem to have the correct threads, nor size to add the filter.

Any ideas re what is needed ?

Regards,

Lance
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  #2  
Old 07-10-2020, 10:27 AM
Ittaku (Con)
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I use a ZWO filter drawer for 2" filters. Obviously you'd need to adjust your spacer lengths if you want that exact distance again.

https://agenaastro.com/zwo-filter-dr...rs-fd-m42.html
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Old 07-10-2020, 10:36 AM
DRCORTEX (Lance)
Neo - as in Dr Neo Cortex

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Quote:
Originally Posted by Ittaku View Post
I use a ZWO filter drawer for 2" filters. Obviously you'd need to adjust your spacer lengths if you want that exact distance again.

https://agenaastro.com/zwo-filter-dr...rs-fd-m42.html
Yes, I am considering this. How wide is this draw. I use one shot colour, so would only use something like an Optolong L-Pro. Normally I shoot Nebulae with a Hyperstar and L-Enhance.

Regards,

Lance
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Old 07-10-2020, 03:06 PM
Ittaku (Con)
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Quote:
Originally Posted by DRCORTEX View Post
Yes, I am considering this. How wide is this draw. I use one shot colour, so would only use something like an Optolong L-Pro. Normally I shoot Nebulae with a Hyperstar and L-Enhance.
Full specs, including measurements, are on this page:
https://astronomy-imaging-camera.com...ter-drawer-m42
I think 8mm wide based on that? It only fits one 2" filter though, and I use it for my Baader UR/IV filter.
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Old 14-10-2020, 01:42 PM
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Robert_T
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i also went with a filter drawer but a square version with two drawers.

i belive the ZWO one is 21mm and can replace their 21mm extension.

the one I got is 16.0-16.5mm and can replace that width extension. https://proastroz.com/products/teles...smart_campaign
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