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twelly27

Lunt 50mm/60mm comparison

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You coupon could try a polarizing filter in front of the camera. This may suppress the unwanted reflections. Seems to work well with some PST mods.

 

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Yeah but, It's only one of the polarising elements you need (half of the assembly you show)....rotate the filter/ eyepiece/ camera to see if the reflections are being reduced.

 

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Lots of questions- sorry,  first of all some great advice. I am just about to part with a large amount of money for a 60mm Ha Double stack B1200 system, . But I am still undecided about whether pressure tuning is worth the money and looking forward, how much maintenance is required/cost. Also how much is the polarizing filter to cut down reflections- is this a problem when imaging? .  is the Crayford focuser any good

Anyone used the   ZWO AS1178 mono camera with the 60mm, any problems?

What tripods do you recommend - not a lot of money left !

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Richard,

I don't use Lunt scopes, so can't provide first hand user feedback. I have had a couple in for repair...

The 60mm DS Lunt it fitted with a 50mm external etalon - so it's really a 50mm solar scope.

The only issue with the PT arrangement is the occasional replacement of the O rings and effective greasing, other than that it seems to work pretty well.

I wouldn't worry too much about reflections - I use two SM60 external etalons as my DS on an ED80 with no additional filtering. Try it first, then consider added filters later.....

The ASI 174MM with the small 2.4 micron pixel and a 7.4 x 5mm chip size will just (!!) allow a full disk image. Should work OK.

I use the ASI 1600MM for my solar imaging, and a ASI 174MM for the longer focal length spectroheliograph.

FireCapture for AVI/SER acquisition, AS3! for stacking and ImPPG for the tweaks....

Hope this helps.

Ken

 

 

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Thanks Ken, do you how large you could print out for a good photo using the ASI 174mm. Also any recommendations on budget tripods wont have much left after buying scope and camera. Anything else I would need?  many thanks for your help

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Don't do any prints, so, sorry can't help with that one. (on the screen with Tiff files I can use solar images >150mm diameter or so with no loss of definition)

I use a HEQ5 mount (why? because it's there!) I also have an ol' AZ3 mount which I use for PST etc testing. Works OK, with manual hand controls.

The only other thing is a suitable shade cover...I used a grey 80 ltr tub with the lid hinge gaffa taped and a piece of fencing wire to hold the lid open, to hold the laptop - drape a dark sheet over the lot and you can sit in comfort.

 

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