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Reducer/field flattener for comet hunter

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#1 Wplash

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Posted 16 July 2019 - 12:25 AM

Hey everyone,
I'm looking to increase my fov with my ES david h levy comet hunter. As this is a mak newt, i was wondering if it's even possible to use a reducer? If i did i would assume it should require a flattener to fix the added curvature that the reducer would be adding? Since the corrector already fixes coma, i assume this would be difficult... perhaps not even possible?

Thanks in advance
Jason

Edited by Wplash, 16 July 2019 - 12:26 AM.


#2 TxStars

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Posted 16 July 2019 - 01:10 AM

I know Takahashi made reducers for their MT series of newts so it can be done..

You could try something like this:

https://www.teleskop...ter-thread.html

 

 

Not sure how well it would work tho..



#3 Jon Isaacs

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Posted 16 July 2019 - 08:31 AM

What eyepieces are you currently using?

 

Jon



#4 Wplash

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Posted 17 July 2019 - 12:41 AM

Its for AP. I have an ASI 178 mm cool that i truly enjoy using. However it's a smaller chip size. A reducer would help increase my range of targets.

#5 Vla

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Posted 18 July 2019 - 05:09 PM

Its for AP. I have an ASI 178 mm cool that i truly enjoy using. However it's a smaller chip size. A reducer would help increase my range of targets.

Here's what it would look like. I don't know the mechanical measures, but this should be close. I threw in a 0.75x reducer lens, which is not optimized, but looks promising for a simple 2-lens reducer/flattener). Both are flat field (btw. the MN is not free of coma, it is only reduced; in this case the system has about half the coma of the primary). The problem seems to be obvious, and that is how to make the image w/reducer accessible.

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#6 RaulTheRat

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Posted 18 July 2019 - 05:35 PM

Its for AP. I have an ASI 178 mm cool that i truly enjoy using. However it's a smaller chip size. A reducer would help increase my range of targets.


IMO a bigger chip is a better investment. The ASA reducers are for traditional newts and I never heard anyone using one with an MN, I'm not saying it wouldn't work, but I suspect it may not.

The CH has a pretty decent size corrected field, and any reducer/corrector you might buy that had decent performance would be a fair bit of the cost of a bigger chip camera anyway so I think you should consider that instead.

#7 Wplash

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Posted 19 July 2019 - 12:11 AM

Yea, i thought getting an asi 1600 would be the best option. But that price tag though...ugh. Thanks for the responses guys!


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