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So who has sprung for these 7 lens extenders? Anyone have one for the recent epsilons. Curious about experience for 130d at 650 mm, to compare to my apo at similar focal length and f-ratio. Spot size looks to be excellent also. |
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Hi Colm, I recently got one for my 180ED. I was struggling with the native corrector using my QHY600 and the tiny pixels. Even the very slightest miscollimation , focuser misalignment etc is hugely magnified. The new extender although it makes the scope an f/4.2 is a much better match for this camera and I think the star quality is definitely better. Made a HUGE difference at least in my case! Dave |
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| thanks Dave. Interesting. My ZWO2600MC has the same pixels, but behaves well with the 130D more or less. The 650 mm at f/5 gives a great galaxy imaging scope for my Bortle 6/7 seeing, giving my 1.2"/px and that worked great with the big apo. One thing I cant glean from pictures: are they big? |
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Hi Colm, I thought I had a picture of it on my scope but all I could find was this one which shows roughly the size out of the box. Dave  |
