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About fluX

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  1. Thanks so much for your very helpful advice everyone. I'm pretty much convinced about the Avalon Linear. There's only 1 more thing I'd like to know about it. Does the Linear have a polar alignment function like the Celestron/Skywatcher All Star Polar Alignment routine? I'm often imaging from my balcony which has the entire north side blocked from view. Polaris is thus not visible. For longer exposures I always do a drift alignment after having completed an ASPA routine. It gives me pretty close alignment and saves me a lot of time. I checked the Avalon manual, but couldn't
  2. I've been researching mounts the last few months to decide upon a new one as I feel my skywatcher NEQ6-PRO isn't up to the task. I have narrowed down my list to an Avalon Linear and a second hand, barely used Astro-physics Mach 1 GTO from 2009. I want to do narrow band imaging with my 130mm triplet APO which with imaging gear weights about 30lbs. Focal length is 910mm. The camera I use is a ZWO 1600MM Cool. At the moment I'm clinging towards the Mach 1 as I know A-P is one of the premium mount makers. Though I think the Avalon linear must be great too. I must point out tha
  3. Thank you all for your helpful advice. Olly you are right, that Altair telescope is optical the same. I think it's built in the same factory. I decided to go for the TS Photoline 3" 4 elements FF/FR because it is also recommended for TS scopes that have same optics and it has a M68 thread to which I already have an adapter from my focuser. I'll let you guys know how it performs.
  4. Any advice on this? I'd like to buy a really good product for my scope. Any thoughts on the APM Riccardi reducer-flatteners? They are extremely expensive, but really worth the money? I'm kind of lost.
  5. Thanks Michael, I had seen this before, but I was looking for a flattener/reducer in 1 package. Or would it be better to place a non-flattening reducer behind (or in front of?) the flattener? I'd very glad to get more advice on this as I have no experience with these parts.
  6. Thanks Jim, Isn't this Focal reducer specially built for the SW ED80? Will it work with my scope's different optics?
  7. After a break of about 3 years I'm back in amateur AP. I have a new apochromatic refractor now, but I'm having a very curved field with comet like stars at the edges of the field. What I don't understand is why the curvature of the field is apparent not only at the edges, but up to quite close to the center as well. The aberration is worst at the edges though. It's a 130mm aperture, 910mm focal distance triplet with a FPL-53 ED element and 4 inch rotatable Crayford focuser. You can see all specs here: http://www.robtics.nl/product_info.php?cPath=21_23_259&products_id=1181
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