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.
 
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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