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Originally Posted by skogpingvin
Very interested to hear from someone who has the same scope. Sounds like you've got a different reducer. What do the stars in the corners of your field look like?
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With the camera (ASI1600MM-C) and the filters I've got (1.25"), I get slight vignetting. I think if I could get a smaller connector I'd be able to get rid of it. That masks some of the current errors. I had a thought this morning that I might remove the filter wheel and check the field is flat with no reducer in line - and fix things as required.
If that's ok, I'll add in my reducer. I'm trying to get this reducer to work:
http://www.teleskop-express.de/shop/...Teleskope.html In a bit of insanity I thought I'd try for 0.6. If I get it to work, the scope will be at f3.9. So far, I haven't been able to get the spacing right with all the gear - but I might do some tests without some bits (like the FW again) to get the magic 55mm required and see what the field is like.
Quote:
Originally Posted by skogpingvin
I focus using my fingers. I know it's old school, but my technique is that I take an exposure of a handy cluster or something, then look at the preview zoomed to the max, then adjust and take another. While tracking, if you take a number of exposures, you can flick through them all at max zoom, and get a pretty good understanding of what the best one is. You then have to get back to it, which is the trick...
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I got sick of manual focusing pretty quick. Any scope I buy from now on either has a motorised focuser or will get one.
Quote:
Originally Posted by skogpingvin
I'm planning a visit to a dark sky site next weekend for Centaurus A (weather permitting, of course) and at this stage they're forecasting freezing temperatures both Friday and Saturday. I don't have any dew zapping equipment, so I'm going to take my daughter's hair dryer! A few seconds blowing on low power and warm heat down the dew hood between subs should do the trick, and I'm hoping it won't upset the optics too much. I'll get a couple of dew straps, but I have to pay for school fees and a final payment on a bathroom before that's going to be possible.  |
Good idea all round.
