One fault using the C9.25 with a 3X or 4X telecentric is the very high efl that results (from 6900 - 9200 mm). I've been using these last few days of poor seeing to adjust the focal reducer/sensor separation using 2" extension tubes to try to get down to 4000 - 4500 mm. I'm playing with 2" (0.7X - 0.8X) reducers that mount easily in the optical train. I think I'm just about there. Anyway, here is a trio of images from today (August 3).
Lou
Images from August 3
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Re: Images from August 3
I shot this yesterday as well with a quark and 152mm at about f30. Did not have time to experiment but yours are nicer than mine. I get reflections from a iv/it filter I have and poorer contrast.
Nice work!
Nice work!
Explore Scientific 152mm f6.5 achromat
Aeries D-ERF
Quark Chromosphere f27 native, (f14 when focal reduced)
Mallincam .5x focal reducer (large format)
12nm Filter
ZWO174 (IMX249 chip 5um)
Huge Sense of Adventure Viewing Creation
Aeries D-ERF
Quark Chromosphere f27 native, (f14 when focal reduced)
Mallincam .5x focal reducer (large format)
12nm Filter
ZWO174 (IMX249 chip 5um)
Huge Sense of Adventure Viewing Creation
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Re: Images from August 3
Here are mine for. 8-3, one of which matches yours but yours is far superior. These are grabs not processed.
Explore Scientific 152mm f6.5 achromat
Aeries D-ERF
Quark Chromosphere f27 native, (f14 when focal reduced)
Mallincam .5x focal reducer (large format)
12nm Filter
ZWO174 (IMX249 chip 5um)
Huge Sense of Adventure Viewing Creation
Aeries D-ERF
Quark Chromosphere f27 native, (f14 when focal reduced)
Mallincam .5x focal reducer (large format)
12nm Filter
ZWO174 (IMX249 chip 5um)
Huge Sense of Adventure Viewing Creation
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Re: Images from August 3
Good captures Lou! Keep persevering Jack, you'll get there with it.
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
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Re: Images from August 3
Nice work, Lou.
Stu.
Stu.
H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Images from August 3
Hi, Jack
One drawback with these proms is that they are so feint that you have to boost either gain or gamma so high that unwanted "glow" is accentuated and reduces background contrast. The hazy conditions in the skies here didn't help much either.
Lou
One drawback with these proms is that they are so feint that you have to boost either gain or gamma so high that unwanted "glow" is accentuated and reduces background contrast. The hazy conditions in the skies here didn't help much either.
Lou
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Re: Images from August 3
Thanks for the encouragement Lou and Mark
Explore Scientific 152mm f6.5 achromat
Aeries D-ERF
Quark Chromosphere f27 native, (f14 when focal reduced)
Mallincam .5x focal reducer (large format)
12nm Filter
ZWO174 (IMX249 chip 5um)
Huge Sense of Adventure Viewing Creation
Aeries D-ERF
Quark Chromosphere f27 native, (f14 when focal reduced)
Mallincam .5x focal reducer (large format)
12nm Filter
ZWO174 (IMX249 chip 5um)
Huge Sense of Adventure Viewing Creation
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