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12-15-2008, 11:47 AM   #1
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M 100 f/2.8 vs. Lake Dunked Tammy

.

No test charts, just some IQ test subjects. The angles and lighting may be
a little different between shots, but gimme a break, this is just casual stuff, man.


It's really cold here, and the world of photography shrinks...

(all shots wide open (2.8), 100mm, ISO 400, similar if not exact shutter speeds)

M 100 f/2.8

Tamron 70-200 f/2.8


M 100 2.8:

Tamron :


M 100 2.8:

Tamron:


M 100 2.8:

Tamron (focus was on middle of bunch):


M 100 2.8:

Tamron:


One of the points is here to show how surprisingly well my lake-dunked-tammy
does against one of my sharpest-wide-open primes. The contrast of the 100
is better, as is sharpness, but the Tamron hangs in there.

Here's a harsh light source, where you see the 100 pull ahead:


Tamron (focus was on blocks, not giraffe)



The diffusion from the dirty elements can be seen in that last shot.


No thread would be complete without an appearance by Albert Einstein:



(M 100 f/2.8)


Last edited by jsherman999; 12-15-2008 at 12:10 PM.
12-15-2008, 12:19 PM   #2
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Is that dust on the sensor or dust on the slippers? lol
12-15-2008, 04:23 PM   #3
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good to see the lake dunked lens till working..

Now, you've mentioned that the M85 is sharper than the M100 in other threads. Is that still your experience. If you're bored, you can do an M85 vs M100. I have the M100 and it's the sharpest M lens I've used, but haven't tried the 85 (They are so close in FL to begin with and the extra stop doesn't concern me, plus I have the FA77)
12-15-2008, 04:37 PM   #4
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Still. If you want to do a fair comparison, you should try as good as you can to focus as well with the one as with the other.

The first snow pic is a good example of that intention failing... no wonder the tammy looses the battle.

Syb

12-15-2008, 04:41 PM   #5
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It is a drag being cooped up in the winter isn't it? Every time I see what you are doing with the M 100/2.8 I give myself a slap for selling mine. I love my A 100/2.8 macro but there was something about that M 100. Since you have all this indoor time on your hands I wouldn't mind seeing how the M 100 and M 85 compare. Just to be on the safe side stay away from the lake.

Cheers

Tom G

Last edited by 8540tomg; 12-15-2008 at 04:42 PM. Reason: Typo
12-15-2008, 06:30 PM   #6
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QuoteOriginally posted by eccs19 Quote
Is that dust on the sensor or dust on the slippers? lol
Seeing dust and fine hairs on objects brings joy to my heart, it means my lenses are sharp.

QuoteOriginally posted by augustmoon Quote
good to see the lake dunked lens till working..

Now, you've mentioned that the M85 is sharper than the M100 in other threads. Is that still your experience. If you're bored, you can do an M85 vs M100. I have the M100 and it's the sharpest M lens I've used, but haven't tried the 85 (They are so close in FL to begin with and the extra stop doesn't concern me, plus I have the FA77)
Good idea. At 2.8, the M 85 f/2 will be stopped down one, but I could also try
wide-open vs. wide-open for the hell of it.


QuoteOriginally posted by Syb Quote
Still. If you want to do a fair comparison, you should try as good as you can to focus as well with the one as with the other.

The first snow pic is a good example of that intention failing... no wonder the tammy looses the battle.

Syb
I know - like I said, just a casual encounter with my lenses, nothing fancy.

There are two ways to test lens sharpness - a definitive chart test, with all
variables mitigated, or constant shooting with each lens - you tend to 'see'
the sharpness in every circumstance, and get a feel for how sharp your lens
really is.

Sometimes it's hard to re-create what's visible over 500 shots in one or two
posted web shots - it's not as obvious when you drop your sample size down
to two everyday shots and then say "see? A is sharper than B!"

That's why charts or brick walls can be good - very day shooting experience
distilled down to a couple hard-to-refute shots.

But they're so damn boring. I'd rather shoot colored blocks with cool lighting.

(also, if you notice, I labeled the point of focus in those snow shots was different)


QuoteOriginally posted by 8540tomg Quote
It is a drag being cooped up in the winter isn't it? Every time I see what you are doing with the M 100/2.8 I give myself a slap for selling mine. I love my A 100/2.8 macro but there was something about that M 100. Since you have all this indoor time on your hands I wouldn't mind seeing how the M 100 and M 85 compare. Just to be on the safe side stay away from the lake.

Cheers

Tom G
Tom, you are wise - the lake can get you in either season. When your feet
fly out from under you and your camera slams down on the ice (seen it happen,
not to me, thankfully) you appreciate terra firma a bit more.


Last edited by jsherman999; 12-15-2008 at 08:37 PM.
12-15-2008, 06:33 PM   #7
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Which color is the truest on the slippers? One is a little lighter than the other according to my monitor.
12-15-2008, 06:47 PM   #8
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I'm impressed the Tammy is doing this well. Unfortunately it will probably have a shortened life with the water having gotten inside. There's likely to be some corrosion to the small circuit board and other bits. But at least you can still use it and it might be fine for a long time to come.

12-15-2008, 08:33 PM   #9
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QuoteOriginally posted by TYOsborn Quote
Which color is the truest on the slippers? One is a little lighter than the other according to my monitor.
They look pretty similar on my monitor - but I guess the 100's colors are a bit truer,
although to me, they have about almost the same hue in those images.

QuoteOriginally posted by Peter Zack Quote
I'm impressed the Tammy is doing this well. Unfortunately it will probably have a shortened life with the water having gotten inside. There's likely to be some corrosion to the small circuit board and other bits. But at least you can still use it and it might be fine for a long time to come.
I dried it out with a hair dryer as soon as I got home. Hopefully it'll keep crankin'.
We'll see. It's like a terminal patient with 6 months to live on his 10th month.

A couple more from Dunkie taken right at sundown:




And snowflakes suspended from this morning:

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