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MOD3 Eyecup?

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#1 AsterMap

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Posted 04 December 2021 - 06:13 PM

Hello,

 

I am looking into making the plunge into NV, and I am leaning toward the MOD3 C-mount setup because I have lots of Canon EF and FD lenses I can adapt.  I am curious why all the pictures of MOD3 units don't show the rubber eye cup like the PVS-14.  Is it a uniform eyecup or is there none?  Do I need one?

 

I'm in Bortle-7 North San Fernando Valley, Los Angeles.  There is lots of light trespass from a school across from me (they run security lights 24-7), but my backyard is somewhat shielded.

 

Thanks,

 

Todd

 



#2 Mazerski

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Posted 04 December 2021 - 06:31 PM

The Mod 3 comes with eye cup and I keep it on all the time - others users may remove cup for other reasons. 

 

You will need filters and 1.25" or 2" filter size up to you and if you are not sure, dig a little as there is a ton of info on this.

 

Strongly suggest you pickup the following (I live on east coast in B7 sky):

== Baader 685nm IR filter for good contrast in looking at clusters, galaxies and general gazing the sky

== Astronomik 6nm Ha CCD filter for views of emission nebula

 

Note: The Astronomik 642nm IR filter is great for looking at milky way clouds and some nebulosity is visible.

 

 

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#3 AsterMap

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Posted 04 December 2021 - 06:36 PM

Thanks!

 

Nice PVS-7 stack.



#4 GOLGO13

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Posted 05 December 2021 - 06:09 PM

Mine has the eye cup. In general I don't use it unless there is a high chance of dew. I find it's best to use glasses when observing with night vision. That can still be done with the eye cup on, but it tends to leave marks on the glasses over time.

#5 careysub

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Posted 09 December 2021 - 08:24 AM


 


Note: The Astronomik 642nm IR filter is great for looking at milky way clouds and some nebulosity is visible.

There is also the Optolong Night Sky H-Alpha Long Pass Filter (650nm) which I have.



#6 havieair

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Posted 08 February 2022 - 12:33 AM

I like using the rubber eyecup but the thing will not stay on. I feel like I get it seated well onto the retaining ring flange but any little nudge and the rubber eyecup goes flying off. I don’t have this issue with any other eyepiece eyecup, just on the mod3.  I’m wondering if my rubber eyecup is a dud and debating buying a replacement eyecup but thinking by nature of the design it just may not seat very tight. Anyone else have this minor annoyance? 



#7 careysub

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Posted 08 February 2022 - 03:07 PM

I like using the rubber eyecup but the thing will not stay on. I feel like I get it seated well onto the retaining ring flange but any little nudge and the rubber eyecup goes flying off. I don’t have this issue with any other eyepiece eyecup, just on the mod3.  I’m wondering if my rubber eyecup is a dud and debating buying a replacement eyecup but thinking by nature of the design it just may not seat very tight. Anyone else have this minor annoyance? 

I have glued eye cups on to lens assemblies using West Systems G-Glex epoxy (a tough flexible epoxy) and with E5000, a strong very elastic solvent-based cement. In both cases the eye cups stayed on.


Edited by careysub, 08 February 2022 - 03:07 PM.

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