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01-27-2011, 01:04 PM   #1
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Which one to keep M50mm f4 or A50mm f2.8

Guys I have a dilemma here; I have both M50mm f4 and A50mm f2.8 (dont ask how and why [LBA]), now besides A & M difference, what other advantage or disadvantages are there to consider over another.

01-27-2011, 01:32 PM   #2
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If you are happy with both: the A will go for a higher price.
01-27-2011, 01:35 PM   #3
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I agree with Freewheeler - I assume these are both macros - with macro you are generally taking your time with setup and composition, and generally need to stop down more than normal photos, so the M lens should suffice 95% of the time, and be adequate the other 5.
01-27-2011, 03:06 PM   #4
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The A50/2.8 will be easier to focus (brighter viewfinder) and easier to use with extension tubes, due to its greater maximum aperture. It has one more aperture blade! Weight is more but not significant. The A position makes flash work a little easier. The A50/2.8 is probably more flexible for general use, again with the A position, f2.8 and 6 aperture blades. Probably sharpness is close enough not to bother considering. Build quality is up to you.

01-27-2011, 04:28 PM   #5
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considered that you have to stop down metering, A is little bit easy to set the composition , and this lens is superberp. the build quality is the same only M have little bit weight. i will go for A considered metering and perhaps can take picture some fly or moving butterfly ..
01-28-2011, 07:05 AM   #6
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I would keep the 'A', brighter view, and it is fast enough that you could do some portrait work with it as well.
01-28-2011, 07:17 AM   #7
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50mm lenses tend to accumulate if you have even a mild case of LBA. Unless you're so broke the rent or groceries are riding on it you may as well just hang onto both of them. Use one for a while, then swap off and use the other one. Make the intervals long enough and it is almost feels like you just got another new lens each time you swap them out. Most of the fun of getting another lens, but with none of the expense.
01-28-2011, 07:27 AM   #8
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As for me, I would keep the A because what I look for is a lens that's easy to use and as fast as possible.

If what you're looking for is more pocket money keep the M, if you're looking for functionality keep the A, if you're looking for IQ compare your pictures with both and keep your faavourite!

01-28-2011, 08:48 AM   #9
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My answer is, they're both good tools with different characteristics. Right now, not counting enlarger lenses or an Industar-50 on tubes or bellows, my only dedicated macro Fifty is the MacTak 50/4(1x). It doesn't behave better or worse than those other lenses, just different. They're all useful tools.
01-28-2011, 11:59 AM   #10
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I had two copies of the A 50mm Macro and they were both very good.
As others have stated, having a wider aperture makes viewing, composing and focusing easier. Also you can use every exposure mode on your camera as you control the aperture from the camera body. In addition your photos will have exif info, useful when sorting your images and gives valuable info on your exposure settings.
01-28-2011, 12:11 PM   #11
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QuoteOriginally posted by bdery Quote
If what you're looking for is more pocket money keep the M, if you're looking for functionality keep the A, if you're looking for IQ compare your pictures with both and keep your faavourite!
I couldn't give better advice than this.
01-28-2011, 06:00 PM   #12
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Thanks guys.
Keep A50: majority (almost every body)
Keep M50: if money is concern
@MC, no money is not a problem (can use the money to buy a 15mm ltd), as you said 50s are easy to accumulate and felt guilty to have so many 50s. (if interested see equipments in profile)
Decision:list M50 in local kijiji/CL at it's top price, if someone takes it, fine. If not, its mine.

Last edited by ultraviolet; 01-28-2011 at 07:42 PM.
01-28-2011, 07:18 PM   #13
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QuoteOriginally posted by ultraviolet Quote
... as you said 50s are easy to accumulate but felt guilty to have so may 50s.
You only have eleven (11) Fifty's? That's barely a good start! Of my ~190 current lenses, ~45 are Fifty's. You have far to go yet, grasshopper. Assuage your guilt by taking each out for a regular walk. Savor the flavor and complexity of each, its individual bouquet, its subtle nuances. Think of each as a different wine for different occasions. Enjoy!
01-28-2011, 07:39 PM   #14
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QuoteOriginally posted by RioRico Quote
You only have eleven (11) Fifty's? That's barely a good start! Of my ~190 current lenses, ~45 are Fifty's. You have far to go yet, grasshopper. Assuage your guilt by taking each out for a regular walk. Savor the flavor and complexity of each, its individual bouquet, its subtle nuances. Think of each as a different wine for different occasions. Enjoy!
Its been just eight (8) months moved from Canon to Pentax; give me some time.

Last edited by ultraviolet; 01-28-2011 at 07:53 PM.
01-28-2011, 11:42 PM   #15
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QuoteOriginally posted by ultraviolet Quote
Its been just eight (8) months moved from Canon to Pentax; give me some time.
We forgive you. I only have, let's see, about 14 (if we count the 55mm lenses as well). They really do accumulate and are addictive.
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