12-29-2014, 09:56 AM
Hi,
I think the larger aperture the better, I've not found that IQ/sharpness is as noticeable as noise, if you have a fifty 1.4 it's worth ago just to see (albeit too narrow a FL), but yeah I like the look of the Samyang 12mm
F2 for astro, a good wide angle and probably decent enough sharpness wide open, every stop helps, also you won't break the bank buying it. The lack of AF at that FL is of little consequence!
I have the Pentax astrostar tracer 0GPS1 which enables the shake reduction system of the sensor to move compensating for the Earth's rotation, which gives decent results for up to 2 mins. exposure, it can take up to 5mins but I've found trails at that point, this shot was about 60 secs. when the Perseids were shooting!
I think the larger aperture the better, I've not found that IQ/sharpness is as noticeable as noise, if you have a fifty 1.4 it's worth ago just to see (albeit too narrow a FL), but yeah I like the look of the Samyang 12mm
F2 for astro, a good wide angle and probably decent enough sharpness wide open, every stop helps, also you won't break the bank buying it. The lack of AF at that FL is of little consequence!
I have the Pentax astrostar tracer 0GPS1 which enables the shake reduction system of the sensor to move compensating for the Earth's rotation, which gives decent results for up to 2 mins. exposure, it can take up to 5mins but I've found trails at that point, this shot was about 60 secs. when the Perseids were shooting!