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Old Apr 13, 2006, 2:18 PM   #1
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Thought I'd give my old M Series 100mm f4 Macro lens a test - when I went to sell it, I was informed that there was internal 'blooming' which would affect contrast - another dealer commented that it had condensation inside.

Well here's a close up of a Ladybird shot using Pentax *istDS
Shutter Speed - 1/125S
F number- f8

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Old Apr 13, 2006, 2:54 PM   #2
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If you have a SMC-M 100 mm f4 Macro – keep it! Use it! "They don't make them like this nowadays". If it needs service it's worth it.

Kjell
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Old Apr 13, 2006, 7:53 PM   #3
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i've got one of these and even tho they're a 1:2 macro i have gotten consistently great images from it. as bily said,, keepit,useit.

roy
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Old Apr 15, 2006, 5:04 AM   #4
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In another thread someone asked about the macro lenses performance at the infinity end. This morning I tried my SMC-M 100 mm f4, and these are the results. Both pics taken at f9,5, the neighbours house (nearest neighbour, what do you say in New York and Dallas?) at speed 1/1500, the wood pile (for which I'll be using Easter Holidays to cut and chop for next winter) at 1/500.

Kjell
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Old Apr 15, 2006, 5:04 AM   #5
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Detail
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Old Apr 15, 2006, 5:06 AM   #6
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Wood pile,the trueBroken Back Mountain :-)


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Old Apr 15, 2006, 5:08 AM   #7
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Detail. The details have been resized in PSE, giving more pixels than the original picture had.Conclusion: the lens resolution and sharpness is higher than the 6 MP CCD.
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Old Apr 16, 2006, 6:06 PM   #8
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Very nice pictures, and definitely sharper than what I was getting with the Kiron. They certainly get me thinking of getting a macro lens again.
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Old Apr 16, 2006, 7:09 PM   #9
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these can be had on ebay for about 100us. well worth the $$. think i gave about that in '78 when i got mine..

what is internal blooming anyway????

roy
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Old Apr 16, 2006, 10:16 PM   #10
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robar wrote:
Quote:
these can be had on ebay for about 100us. well worth the $$. think i gave about that in '78 when i got mine..

what is internal blooming anyway????

roy
Catbell did not mention if it is M100 2.8 Macro or F4. I doubt if M100 Macro 2.8 can be below $200. F4 maybe.
I believe he meant condensation within elements which affect the contacts (not contracts).

Daniel
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