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03-06-2008, 03:19 PM   #1
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Lense ?

What are all the different numbers and * symbols meaning as for quality and how do they rank?

Sorry I am a rookie at this still

03-06-2008, 03:33 PM   #2
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What the heck are all those letters anyway?

Here is a brief list.

M42 or S/M is screw mount lenses. They go on K mount cameras with an adapter.
K lenses, are not labeled K. They are manual focus and manual aperture.
M lenses are the same as K, but generally smaller
M* lenses are "pro" quality, with a price to match.
A lenses have an A setting on the aperture ring - you can set it in the camera
A* lenses are "pro" quality, with a price to matdh.
F lenses are autofocus
F* I do not believe ever existed
FA lenses are autofocus
FA* the expensive version again
FA-J lenses are autofocus, but have no f/stop ring. Only late cameras can use them
D-FA lenses have the digital coatings, but cover a full 35 mm frame. No aperture ring.
DA lenses don't cover the 35 mm frame, only the APS-C sized sensors. No aperture ring.
DA* lenses are weatherproof, and pro quality and expensive. No aperture ring.

Last edited by Canada_Rockies; 03-06-2008 at 03:35 PM. Reason: DA aperture ring comment
03-06-2008, 06:39 PM   #3
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WOW! Thanks Canada Rockies=)

A sigma 50-500 would be considered What?...... Awesome glass, good glass, ok glass ?

Is * glass the best money can buy?

How does Sigma compare to Pentax stuff?

I was going to upgrade my K10 but am finding out I need more lenses, and better lenses.
03-06-2008, 09:50 PM   #4
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QuoteOriginally posted by Cvrn Quote
WOW! Thanks Canada Rockies=)

A sigma 50-500 would be considered What?...... Awesome glass, good glass, ok glass ?

Is * glass the best money can buy?

How does Sigma compare to Pentax stuff?

I was going to upgrade my K10 but am finding out I need more lenses, and better lenses.
I had a bad experience with a Sigma 170-500 that I found overly soft, and went back to the Pentax prime 400/5.6. I've pretty well settled on using Primes for long lenses. All the looking around I have done has indicated that the long zooms still tend to be a bit softer than the primes.

My LBA is aimed at DA* lenses. I am very, very happy with the two I have.

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