Quote:
Originally Posted by gregbradley
I don't know. Thats a fair bit of coma.
It probably would disappear around f2 to F2.2 if its the same as its 24mm F1.4 sibling I have. So in a way these F1.4 lenses are a misnomer for astro work. They are usually no good until stopped down. Coma and chromatic aberration are too high until about F2.2 and you are back to practically F2.8 anyway. In terrestial imaging these characteristics are not so much of a problem as they are bought mainly for shallow depth of field effects. But for astro coma and CA are super important.
Sigma 35mm F1.4 is the lens to get here. More expensive but hey - its the sharpest lens DXO Mark has ever tested. That's an amazing feat.
The trouble of course is they are $800.
Having said that my Samyang 24mm F1.4 is a nice lens and gives rich colours. Its also got a nice focus ring feel which is important with a manual focus lens.
Greg.
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thanks for the input guys....... now is the comparison unfair because one of them is a zoom?
and greg i must admit i dont see much coma on the samyang compared to the canon...... i guess thats why i am interested in how fair a comparison really is as this is my first ever lens
pat