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Old Aug 23, 2009, 8:38 AM   #1
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Default Anyone have info on these lenses?

Hey Guys!

Looking at a few lenses and wanted to get some opinions about them as far as difference, quality, speed, etc. Anyone use these or have info on them? Thanks in advance.

Sigma 70-300mm F4-5.6 APO Macro Super Lens for Pentax-AF Camera

Sigma 70-300mm F4-5.6 DG APO Macro AF Telephoto Zoom Lens for Pentax
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Old Aug 23, 2009, 9:07 AM   #2
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I don't know anything about the Sigma ones, but I have the Tamron AF70-300mm F/4-5.6 Di LD Macro and it's one of my favorite lenses.

Patty
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Old Aug 23, 2009, 10:06 AM   #3
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I owned and enjoyed using the Sigma 70-300 DG APO Macro. MAcro performance was outstanding (IMO). AS for the zoom range, at F/8 it produced very sharp images until about 290 mm--not unusual for this caliber of lens. OVerall, a great value for the money! I have sinced sold mine since I really did not use it much. I got the Pentax DA 18-250 since I was looking for a walk-about lens for travelling.
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Old Aug 23, 2009, 7:08 PM   #4
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The only difference is that the DG lens has improved coatings to be more compatible with digital cameras, IIRC. I have the APO lens and, like most, I find it begins to get a little soft at over 200mm, but still very useable. Very useful to have 1:2 macro without being too close to subject. It isn't a terribly fast lens, and autofocus can be slow under some lighting conditions. Definitely worthwhile for those of us who don't have megabucks to spend on lenses.

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Old Aug 24, 2009, 9:18 AM   #5
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How about compared to the Tamrons? I was looking at these as well:

]Tamron AF 75-300mm f/4.0-5.6 LD for Pentax

Tamron AF 70-300mm f/4.0-5.6 Di LD Macro Zoom Lens for Pentax

How about the autofocus on these?
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Old Aug 24, 2009, 11:26 AM   #6
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Quote:
Originally Posted by maverick96 View Post
How about compared to the Tamrons? I was looking at these as well:
Tamron AF 75-300mm f/4.0-5.6 LD for Pentax
Tamron AF 70-300mm f/4.0-5.6 Di LD Macro Zoom Lens for Pentax
How about the autofocus on these?
The 70-300 LD/Di LD differ only in the coating - the LD is owned, used and liked by myself and a number of other participants in this forum and is favored for its macro performance. Its macro ratio (at 300mm) goes to 1:2 - the 75-300 does not focus as closely. I also have the Sigma 70-300 (not APO and in Sony mount) and it is an OK lens, but only focuses down to 1:3. The price of having the 1:2 ratio is having to put up with a macro switch for closest focusing - a minor inconvenience, worth it for the extra magnification.
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Old Aug 24, 2009, 9:47 PM   #7
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Thank you all for the feedback. I chose the Sigma 70-300mm F4-5.6 APO Macro Super Lens just b/c I was able to purchase it below $100. Guess Ill find out how I like it!
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