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Old 14-02-2014, 10:20 PM
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Andy01 (Andy)
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Focal reducer/field flatteners

Hi there,

Is anyone using the William Optics P-Flat4 variable FF/reducer or similar?

I have W/O FLT 110 and an SBIG 8300c. Several DSO's are too big to fit into my 1.34* FOV - eg: Eta Carina, Rosette, Seagull etc. and I'm considering getting around the problem by investing in one if these.

What has been anyone's experience with these?
Cheers
Andy
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Old 14-02-2014, 11:46 PM
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I have one and it's quite good. You don't need a whole bunch of different spacers as with most focal reducers to ensure you have the optimum distance from chip to the lens, you are able to adjust the distance internally via an adjuster/slider on the side. Much easier than spacers and I would imagine much more precise because of the slider.

Cheers
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Old 15-02-2014, 07:32 AM
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Quote:
Originally Posted by White Rabbit View Post
I have one and it's quite good. You don't need a whole bunch of different spacers as with most focal reducers to ensure you have the optimum distance from chip to the lens, you are able to adjust the distance internally via an adjuster/slider on the side. Much easier than spacers and I would imagine much more precise because of the slider.

Cheers
What a great idea. I wish more manufacturers offered such a clever mount. You could tune it to maxmise its performance.

Greg.
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Old 15-02-2014, 10:51 AM
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I have one and exactly what White Rabbit said goes for me.
Allan
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Old 15-02-2014, 11:19 AM
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I have the WO Field Flattner/Reducer IV, I use it on my WO FLT132 refractor. It seems to work well, and significantly flattens the field when I use my full frame dslr. I don't think now I have a STT8300 that the flattening is really required as much because the chip is much smaller. The reducing comes in handy still though.
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Old 15-02-2014, 10:10 PM
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Andy01 (Andy)
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Thanks everyone,

With all of your positive replies it looks like I'll be ordering one next week, probably from Andrews.
Cheers and thanks again

Andy
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