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Some RF 16 snowy landscapes

Started Jan 4, 2022 | Discussions thread
Sittatunga Veteran Member • Posts: 5,406
Re: RF 16 astro

JustUs7 wrote:

How is the coma wide open when used for Astro? The 35 f/1.8 is bad.

I've not had a serious try, but here's one I took tonight as the sky wasn't completely overcast. Very hasty set-up, not enough care in focussing as it was too near my bedtime and taken from a street less than a km from the city centre. Deep Prime noise reduction, lens corrections but no chromatic aberration corrections. The trannie van was to hide the nearest streetlight.

Daylight wb, reduced in size, 4s at f/2.8, ISO 1600. Processed in PhotoLab 5, so effectively 14½mm rectilinear FoV, DPP4 gives the same FoV as the 16-35mm at 16mm.

1:1 cropped 3½× to Orion, 1/3 point. The eye of faith can see where the nebula is.

1:1 corner crop

For comparison here's a corner crop from the RF35mm at f/2 - I sent it straight back as I'd wanted it to supplant a Samyang 35mm f/1.4 for astro.

RF 35mm at f/2 with Deep Prime, without chromatic aberration corrections

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KEG
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