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Old Mar 3, 2006, 10:05 PM   #1
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I just picked up one of these for $60, anyone have any experience with it. I was looking for a longer lens than the 70-200mm Takumar. The PENTAX-FA SMC 100-300mm f4.7-5.8 is an SMC lens, and a more modern design but I am interested in its optical performance, especially at the long end. I looked at the FAJ 75-300 but the lack of an aperture ring means it would not work on my old KX or K1000.

Anyone who has tried this lens let me know what you thought of it, I don't mind a little softness at the long end but if it objectionable let me know.



Ira
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Old Mar 4, 2006, 2:29 PM   #2
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SPLOS rates this one poorly, no reason given. You can download the SPLOS in .pdf and full spreadsheet formats here:

http://www.jcolwell.ca/_SPLOSdb/index.htm

It's a handy reference to keep on the desktop. Another good site for hands-on user reviews is Stan's:

http://stans-photography.info/

Hope this helps, Lou
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Old Mar 4, 2006, 5:52 PM   #3
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Thanks derbunk, I am still having trouble getting info on the f4.7-5.8 later model, it apparently may be a little better than the f4.5-5.6 versions (one a power zoom). I guess I will have to discover for myself. The lens I purchased is reported as excellent condition, and as long as the quality is no worse than my FA 28-80mm f3.5-5.6 I will be happy with it. Can't afford an FA* 300mm.

I did find some pictures on another forum from a photographer who liked to shoot birds, particularly terns and hummingbirds, with this lens. His results indicate that this lens is really not that bad showing great sharpness and nice bokeh at 300mm and f8.
Ira

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Old Mar 4, 2006, 8:57 PM   #4
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Okay, showing my naivete again about lenses and just when I thought I was getting good.

With a lens like the FA* 300mm, I understand the 300mm being the focal length, but the "FA*" exactly what does that mean.

I have just been looking at http://stans-photography.info/ site and there are "F" "A" "M" "FA". I would have assumed the "M" was for manual focus, but now I am not sure.

My circumstances are about to change and I am going to be cashed up and want to get some more lenses (LBA all the way...:G) before I go away and price is not going to be a problem, I would hate to be missing out something due to ignorance.



Ira, I recently purchased a new Sigma 70-300mm APO DG Macro and I am very happy with sharpness at 300mm, actually I am very happy with the lens full stop.

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Old Mar 4, 2006, 9:03 PM   #5
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I just fund this baby.

http://www.sigmaphoto.com/lenses/len...mp;navigator=7

Now that looks sexy.:shock:
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Old Mar 5, 2006, 10:51 AM   #6
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M42 = screwmount
K, M = bayonette mount, manual focus and exposure
A = auto exposure, manual focus
F = auto exposure, auto focus
FA = same as F, but can transmit MTF data to camera
* = special glass elements for highest quality, four digit price tags

Lou
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Old Mar 5, 2006, 10:53 AM   #7
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Crashman wrote:
Quote:
I just fund this baby.

http://www.sigmaphoto.com/lenses/len...mp;navigator=7

Now that looks sexy.:shock:
inexpensive too

http://www.adorama.com/SG50045NNKAF.html
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Old Mar 5, 2006, 4:03 PM   #8
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>"inexpensive too

http://www.adorama.com/SG50045NNKAF.html"<

:lol:That is closer to my automobile budget, I could get a good used car for that price!!

Fast, long primes are not in the cards for me right now, although I am looking for a K-mount adapter for an old Tamron 200mm f3.5 screw mount lens I will try. The price was right, someone gave it to me.

Ira


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Old Mar 5, 2006, 10:27 PM   #9
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I am looking at http://www.photozone.de/8Reviews/ website now at some of the reviews on the Sigma lenses. The 50-500mm rates quite well considering it is such a huge range lens.
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Old Mar 5, 2006, 10:54 PM   #10
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Lou

Thanks for that I was guessing on some of those, but it makes sense now, but what is MTF data I hear you ask?

I just did a search and learnt all about "modular transfer function" interesting :?

Al
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