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04-01-2012, 11:06 AM   #1
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Question about Porst 75-260mm F4.5 Macro f. Pentax K

Hello everybody,

I am tempted to purchase this lens: Porst 75-260mm F4.5 Macro f. Pentax K. It is an AF lens with a constant 4.5 aperture.

The place I saw this sells the lens for 200 and I thought it might be good for sports and action, as I am on a tight budget for now and I need a telephoto lens which isn't too expensive. I can barely spend more for now and it seems like a good opportunity to me.

I don't know however if this lens is good enough or wether for the same price I can find a better opportunity ?

Thanks for the input.

04-01-2012, 12:34 PM   #2
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QuoteOriginally posted by BNBPhoto Quote
Hello everybody,

I am tempted to purchase this lens: Porst 75-260mm F4.5 Macro f. Pentax K. It is an AF lens with a constant 4.5 aperture.

The place I saw this sells the lens for 200 and I thought it might be good for sports and action, as I am on a tight budget for now and I need a telephoto lens which isn't too expensive. I can barely spend more for now and it seems like a good opportunity to me.

I don't know however if this lens is good enough or wether for the same price I can find a better opportunity ?

Thanks for the input.
I have a hard time believing this is AF. I have a Tokina branded M42 lens with the exact same specs, and I know it's been made by several other makers as well they were all MF. Verify again because if that's the case, 200 is a rip off.
The lens is very decent at the short end, even wide open, but it is extremely soft at the long end until f/8.
04-01-2012, 01:05 PM   #3
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The lens comes from a german ebay topseller who says it is AF. The ad is here: Porst 75-260mm F4.5 Macro f. Pentax K | eBay
04-01-2012, 01:22 PM   #4
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QuoteOriginally posted by BNBPhoto Quote
The lens comes from a german ebay topseller who says it is AF. The ad is here: Porst 75-260mm F4.5 Macro f. Pentax K | eBay
Sorry but from the look of it I don't think that's AF.

As a matter of fact, it's virtually the same as mine, except for the M42 mount (here's a quick snap w/ my dirt cheap camera phone, but it should already give you an idea).



Therefore I would call that price a MAJOR rip off, unless I'm missing something.


04-01-2012, 05:15 PM   #5
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The advertised lens is *not* AF. Look at the aperture scale. On A-type and AF lenses, an A (aperture automation) position is next to the tightest f-stop number, which on this lens is f/22. The posted picture has 22-16-11 visible, but no A. This is an old MF lens worth maybe US$30.
04-02-2012, 01:36 AM   #6
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Thanks a lot for the help, you guys just saved me a bunch of trouble.
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