How big a difference......

MrAngry2

MrAngry2

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Richard
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...... will there be between an f1.8 and f2.8?

Im after a prime lens to use in low light situations and have seen a Minolta 28mm f2.8 for £80.00 and the Sony 50mm f1.8 for around £130ish. I would much prefer the wider angle on the Minolta but would the extra f stop make the sony significantly better for low light.

Sorry for the noob questions.:shrug:

Thanks in advance.
 
I was thinking the same sort of thing a couple of weeks ago but I was looking for pictures of the same thing at the same time to show the difference between F/2 and f/1.8

I ended up doing my own experiment and found a big enough difference between f/2.8 and f/1.8 (in my case f/2 as well) for me to be aiming at getting a wider aperture lens. Could you borrow one or both of the lenses to see which would suit your purpose best before you go out and buy one?
 
Yes, 1 and 1/3 stop. There will also be a shallower depth of field, though i would have thought the difference between 28mm and 50mm would be of greater concern.
 
Thanks for the input, borrowing isnt an option as im the only DSLR user I know :thinking:.

I was swaying towards the f1.8 but am a bit concerned about the 50mm on a croped sensor.

Im rubbish at decisions :D
 
What will you be taking pictures of in low light? If they move reasonably slowly you may be able to get away with a slower shutter speed?
 
IMO, lens choice should be made by FL first (to get the angle of view you want/need) then refined by maximum aperture and cost. If you need a 28mm (or want one) there's no point in getting a 50mm but upping the ISO or careful bracing to hold a slower shutter speed is a viable option to gain a little extra handholdability needed for a slightly slower lens.
 
50mm is quite close on a cropped sensor. I love my 50mm 1.8 but it's not very versatile owing to the tight field of view. I'm waiting for a 28-75mm 2.8 which I think will be ideal.

As has been said before, decide on focal length before aperture.
 
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