Quote:
Originally Posted by AstroJunk
An Orion 4" solar filter secures firmly to my 100-400mm lens.
I do tend to apply a little extra gaffa tape though if I'm using anything that could potentially be knocked off (it wouldn't just fall off - it is quite secure!).
BTW, that's a really big chip to be imaging the sun at 200mm.
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I'd have to compare the OD on my 2 lenses (70-200 f2.8 and 300mm f4) to see how they compare to the 100-400's OD. I still think I'd prefer a screw on filter - just really eliminates accidents!
Quote:
Originally Posted by Merlin66
Dave,
The solar image at 200mm fl will be less than 2mm diameter......
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I didn't expect it to be that small an image. I have a 300mm f4 IS and 2 TC could always go that way I guess.
Once I've been able to check my EQ6 mount out, I'll be imaging with my Esprit 80 and the ZWO camera!
Much to think about.
Thanks guys!