m31, Try Tamron 90mm

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Astrophotography

15.9 MEGAPIXEL

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Galassie View gallery (16 photos)

m31, Try Tamron 90mm sent on September 28, 2017 (22:11) by Gianluca Galloni. 3 comments, 490 views.

, Posa B f/5.0, ISO 640, tripod.

Ieri sera ho approfittato della serata serena per fare una prova: ho montato la reflex sulla EQ5 con montato il Tamron 90mm Macro per vedere come si comporta, e devo dire che sono piacevolmente sorpreso con stelle puntiformi su tutto il frame. Sono 60 pose da 120” Da migliorare l'elaborazione sulle stelle, vedo degli strani aloni che ho avuto anche la scorsa volta, devo trovare il problema, non ho fatto dark, flat o bias e quindi l'immagine risulta rumorosa. (ho sostituito la foto con questa non croppata)

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5 persons like it: Daniele Dapretto, Marco Parola, Marzio Bambini, Quellolà, Slashleo

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Slashleo

sent on September 29, 2017 (10:04) | This comment has been automatically translated (show/hide original)

Bella test Gianluca !!! ;-) you have a PM!

user44198

sent on September 30, 2017 (0:10) | This comment has been automatically translated (show/hide original)

what I see Gianluca is not the same as that of the other image of open storage, rather the classic chromaticity of a non-apocromous lens, and the focus is not the best, there is a slight coma that is directed towards the center of the frame, the details of the galaxy are very pronounced, sin due to the lack of flat bias and dark, may be more pleasing and with the depth currently missing, you have distinctly recorded the two galaxies NGC 147 and NGC 185; -)

Gianluca Galloni

sent on September 30, 2017 (10:06) | This comment has been automatically translated (show/hide original)

Thanks for the Vega tips, for the alone I forgot to change the description when I replaced the photo (I was able to figure out where I was wrong)
For coma and chromatic problems of course I can not do anything for the focus in fact I think I can improve it even if it's not easy, Tamron's focus ring is not very wide to infinity.
Eh I know, I can fix it with the flat, but dark and bias are now postponed to the next pose ;-)

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Some comments may have been automatically translated with Microsoft Translator.