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 Post subject: Practice Pinwheel
PostPosted: Sat May 12, 2012 11:18 pm 
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Joined: Sun May 25, 2008 12:48 pm
Posts: 8087
Location: UK

Since Bob mentioned it elsewhere I thought I'd have a go at it tonight. Cloud moved in not long after I set up though, so I only got 5 usable exposures of 2 minutes each. Unmodified 600D, Astronomik CLS filter, 135/2 at f/2. 100% crop. I really need a lot more focal length, but wont be usable until I do my mount upgrade.

How much more focal length do I need to throw at it? Well, this is the full version before cropping...


So Bob, how did yours go?

Canon DSLRs: 7D2, 7D1, 5D2, 1D, 600D, 450D full spectrum, 300D IR mod
Lenses: EF 35/2, 85/1.8, 135/2+SF, 70-300L, 100-400L, 100L, MP-E 65, EF-S 10-18, 15-85
3rd party: Zeiss 2/50 makro, Samyang 8mm fisheye, Sigma 50/1.4A, 150 macro, 120-300 f/2.8 OS
Compacts: Sony HX9V, Fuji X100.

 Post subject: Re: Practice Pinwheel
PostPosted: Sat May 12, 2012 11:42 pm 
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Joined: Sat Sep 30, 2006 4:30 pm
Posts: 9886
Location: UK
Hi popo,

I managed 3 x 1,000 second green subs. Together with previous evenings I now have about five or six such subs in each of red, green and blue so I can now think about processing. The quality isn't that good though as my mount doesn't track quite well enough for such long subs so close to the meridian.

The Pinwheel was just a time filler while waiting for the North America nebula to rise. Tonight's plan was 8 x 1,000 H-alpha subs but I'm being frustrated by the same cloud. The sequence is running so I'll stick with it until moonrise and hope at least a few subs are good. This is part of this summer's plan for a four panel mosaic using the TEC 140.

Congratulations on your own capture.


Sony RX1R II. Olympus OM-D E-M1 + M.Zuiko Digital ED 12-40mm f/2.8, M.Zuiko Digital ED 40-150mm f/2.8 + 1.4x T/C, Lumix 7-14mm f/4, Leica DG Summilux 15mm f/1.7 ASPH, M.Zuiko Digital 45mm 1:1.8
M.Zuiko Digital ED 75mm 1:1.8, Leica D Vario-Elmar 14mm-150mm f/3.5 - f/5.6 ASPH.
OM-D E-M5, H-PS14042E, Gitzo GT1541T, Arca-Swiss Z1 DP ball-head.
Astrophotography: TEC 140 'scope, FLI ML16803 camera, ASA DDM60 Pro mount.

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