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Re: Vixen VMC110L F9.4 Maksutov as Solar Scope?

Posted: Thu May 17, 2018 10:06 am
by Merlin66
A photo of the set-up would help....

At this stage I assume you are using the PST Black box with the original PST blocking filter (?)
This is only a 5mm aperture and designed for a focal length of 400mm - the mod really needs a larger blocking filter to give best FOV coverage.
Generally a 10 or 15mm BF is recommended.

If the existing PST ITF is still in good condition, there's nothing to be gained by removing it and replacing with an alternative.

The final filter assembly is made up of two elements - the front ITF and the rear blocking filter. The ITF acts as a "mini erf" and suppresses any resonance bandwidths. The blocking (or sort filter) separates the bandwidth "comb" of frequencies and only allows the narrow Ha bandwidth to go through to the camera/ eyepiece. The majority of failure in (all) solar scopes is the ITF, not the blocking filter.

Re: Vixen VMC110L F9.4 Maksutov as Solar Scope?

Posted: Thu May 17, 2018 4:01 pm
by AndiesHandyHandies
Hi

Lunt 110mm ERF makes up for increased aperture

Vixen VMC110L

PST collimator lens moved forward a few cm.

Standard PST black box.

I am not really bothered with full disk option as with standard PST you had to gimbal eye about to see details. Just scan the scope.
I prefer to see more detail in the interesting bits.

Maybe a bit of extra baffling in the Vixen mirror baffle and before the collimator lens as larger sun grazes the mirror baffle.
Check inside the PST box for stops, blacking and prism alignment.

One mod to increase aperture but use as is and see full disk would be to use 80mm F5 and replace the collimator lens with -100mm and the re-focuser with 100mm?

Andrew.

Re: Vixen VMC110L F9.4 Maksutov as Solar Scope?

Posted: Tue May 22, 2018 5:48 am
by AndiesHandyHandies
Hi

Where is the best free place to place images to give a link to here?

Andrew.

Re: Vixen VMC110L F9.4 Maksutov as Solar Scope?

Posted: Tue May 22, 2018 11:35 am
by marktownley
I use flickr