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First Night Vision 1.25” Filter

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11 replies to this topic

#1 Gschnettler

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Posted 08 July 2021 - 10:08 PM

I have a PVS-7. And a C-mount with a 1.25” adapter. I live near downtown Cincinnati so there is a lot of light pollution.

For my first filter, it seems like a lot of people are recommending a 685nm IR pass filter.

I am planning to use my PVS-7:
- at 1X
- in my AT72ED refractor
- in my 12” dob
- with Nikon DSLR lenses

Would something like this be a good choice?

https://agenaastro.c...lter-685nm.html

Or would something else be better?

#2 Mazerski

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Posted 08 July 2021 - 10:49 PM

Yes to the Baader filter in the link.

Photos attached, ask if something isn't clear.

 

Question: unless you have the c-mount ENVIS how will you use at 1x? 

 

Assuming you have a ScopeStuff or Astromania C-mount to 1.25" adapter, this takes care of using in scopes and make sure you try say M13 or M82 without filter than with filter. 

 

To use with Nikon lens, you need a type of adapter; photo shows the Nikon F to C with filter in place that I can remove. Did you glue in a blank filter ring or cell to screw in (and out) the 685 ? 

 

Note #1: You can use at 1x if you have a 25 (or so) mm Nikon lens.

 

Note #2: To look at emission nebula (Eagle, Omega, Trifed, Lagoon, M42, etc... ) you need a CCD Ha filter -- in light pollution, I would get the Astronomik 6nm

 

 

Attached Thumbnails

  • ENVIS.JPG
  • Nikon F to C.JPG
  • PVS7.JPG
  • FtoC.JPG
  • 6nm.JPG

Edited by Mazerski, 08 July 2021 - 11:15 PM.


#3 shohin

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Posted 09 July 2021 - 12:03 AM

...

 

Question: unless you have the c-mount ENVIS how will you use at 1x? 

...

He has a PVS-7 so he can do 1x with the standard objective.



#4 Gschnettler

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Posted 09 July 2021 - 07:33 PM

Is the Baader 685nm the way to go?

I see that there is also a Optolong IR Pass 685nm Filter - 1.25" available.

Are these about the same or is one better than the other?

#5 joelin

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Posted 09 July 2021 - 09:51 PM

The Badder and Optolong should be more or less the same 

 

I've also used an Antlia 685nm and it works well. It's a bit cheaper than competing brands.

 

If you ever get a bino setup its preferred to have pairs of identical filters as slight differences across brands can make an observable difference.



#6 Gschnettler

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Posted 11 July 2021 - 08:17 AM

For 1X I see that I need an adapter ring for the 1.25” filter. Would this one work?

https://rafcamera.co...s-to-astro-1-25

#7 shohin

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Posted 11 July 2021 - 01:33 PM

That's the one.



#8 Gschnettler

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Posted 11 July 2021 - 01:57 PM

Thanks all.  I just ordered the 685nm filter.

 

For my next filter do you think I should get this one?

 

https://www.highpoin...d-mounted-ha6-1



#9 longbond

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Posted 12 July 2021 - 09:47 AM

waytogo.gif on the Astronomik 6nm. I have 10 h-alpha narrowband filters and the 6nm Astronomik is my GoTo favorite. 6nm has good signal/noise without the drama and expense of 3nm. Additionally, 1.25" Astronomiks come at a reasonable price. With most brands, 1.25" filters are 2/3 the price of 2". Astronomiks 1.25"s are only 45%. Or, put another way, 2" Astronomiks are pricey.



#10 GOLGO13

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Posted 12 July 2021 - 09:45 PM

Thanks all.  I just ordered the 685nm filter.

 

For my next filter do you think I should get this one?

 

https://www.highpoin...d-mounted-ha6-1

You're 12 inch is going to be very good with NV.

 

The 6nm HA would be great to go with your 685. Those are great choices. Quite frankly that's all you would need. And try unfiltered sometimes as well.



#11 Gschnettler

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Posted 12 July 2021 - 11:18 PM

Both 685 and 6nm HA have been ordered. Can’t wait!

Thanks again!
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#12 rns416

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Posted 05 August 2021 - 01:44 PM

How does it compare low end Gen 3 NV gear with premium Gen 3 gear? For instance, Luna optics got some Gen 3 gear vs pvs 7 or 14 . Any insight please, will help me to make my purchase to resist LP in an area that is 8-9 at the scale. 
 


Edited by rns416, 05 August 2021 - 05:22 PM.

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