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06-13-2010, 07:28 AM   #1
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Advice please!

Newbie needs sound advice regarding a birding lens for my Pentax K200D and K20D cameras. My lenses are mostly third-party, second-hand lenses. The best is an old Asanuma manual focus 400mm lens. Go figure.

I really would like to acquire a Bigma, but notice that they have been discontinued? Any suggestions in the Bigma price range would be appreciated.

Thanks.



06-13-2010, 08:19 AM   #2
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From what I have read from actual birders, all the big telephoto zooms are a bit slow for that purpose. However, Sigma makes a 150-500 for $1000, that could be substituted for the newer 50-500 Bigma that goes for $1600. The other solution is to get a different brand of body (perhaps used) which will open up new (and expensive) choices for faster long lenses.

I have seen a used Pentax 500/4.5 manual lens at Adorama for $800 and some similar lens/prices in the Marketplace, but I have a couple manual-focus lenses that require too much...focusing.

(If you are interested in an 800mm f8-32 bazooka, PM me :-)
06-13-2010, 09:20 AM   #3
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Thanks for the response.

No, not interested in the 800mm.
06-13-2010, 03:29 PM   #4
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I have a K200 and K20. If I cannot find an adequate lens for these cameras, guess I should switch brands. Your comment puzzles me a bit. To what were you referring?

06-14-2010, 10:56 AM   #5
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For a birding lens, you're going to spend quite a bit to get something really fast. The Sigma 70-200mm F/2.8 is a good, fast lens, and runs around $800 street. I'm making one of those my next priority.

For something really long, there are mirror lenses that sell for under $300...they're slow but would fit your focal length requirement.

I don't see why you would switch brands. Sigma and Tamron both make lenses that fit Pentax cameras that should fit any budget, focal length, or aperture requirement you have.
06-14-2010, 12:03 PM   #6
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Thanks, re. my cameras' being able to accommodate fast lenses--exactly my thoughts. By the switching body comment, I was referring to Special K's response to my original question. It puzzled me. I like my Pentax cameras. They are wonderful.
06-16-2010, 08:25 AM   #7
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QuoteOriginally posted by deema Quote
Newbie needs sound advice regarding a birding lens for my Pentax K200D and K20D cameras. My lenses are mostly third-party, second-hand lenses. The best is an old Asanuma manual focus 400mm lens. Go figure.

I really would like to acquire a Bigma, but notice that they have been discontinued? Any suggestions in the Bigma price range would be appreciated.

Thanks.

Hello,

I found 2 options currently available;

This Sigma 120-400mm f/4.5-5.6 DG HSM APO Lens is an ultra telephoto zoom lens ideal for nature/outdoor or sports photography. This translates into an equivalent range of 180-600mm when used with a APS-C sized digital SLR sensor.



The use of HSM (Hyper Sonic Motor), APO apochromatic design, three elements of SLD (Special Low Dispersion) glass, and multicoated optics all enable this lens to provide a high level of performance throughout its entire zoom range, as well as versatility. A rear focus system insures quick, convenient manual focus and a non-rotating front barrel.
Sigma | 120-400mm f/4.5-5.6 DG HSM APO Autofocus Lens | 728109


This Sigma 150-500mm f/5-6.3 DG OS HSM APO Lens is for digital SLR cameras with a Pentax K lens mount. It is an ultra telephoto zoom lens ideal for nature, wildlife, or sports photography. This zoom range translates into an equivalent range of 225-750mm when used with digital SLR cameras with an APS size chip. The lens is also compatible with full frame cameras.



The OS (Optical Stabilizer) system minimizes image blur caused by camera shake, and offers the equivalent of shooting at a shutter speed 3-4 stops faster. This allows handheld telephoto zoom shooting even in poorly lit conditions.
Sigma | 150-500mm f/5-6.3 DG OS HSM APO Autofocus Lens | 73A109


C h u c k C a p r i o l a
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06-16-2010, 09:36 AM   #8
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QuoteOriginally posted by deema Quote
By the switching body comment, I was referring to Special K's response to my original question. It puzzled me. I like my Pentax cameras. They are wonderful.
Because it is difficult to find long and fast lenses for Pentax. For Canikon it is pretty easy (though expensive).

Tamron does not make their 200-500 (not even a fast lens) in a Pentax mount. I considered getting the Sony version with a cheap Sony body just for that lens, but opted to go a different way (Sigma 150-500). And the "Bigma" is back, with a 600-dollar price jump.

06-17-2010, 04:41 AM   #9
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I was looking at both of these lenses at B & H. Being new to the world of long lenses, do you have one you would recommend to me over the other? I have read the information and reviews on both and believe the 150-500 fares a bit better in the Pentax reviews.

Thanks. Pennies saved, choice is mind-boggling.
06-17-2010, 08:45 AM   #10
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Hello,

The 150-500 would be the better choice due to the longer focal length.


Chuck
06-18-2010, 04:34 AM   #11
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Thank you so much. Then that is what it shall be! Will of course order from B & H.
06-24-2010, 10:13 PM   #12
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You could bump up the ISO a tad to compensate for the slower lens and PP out the noise later.
Also a payback for the faster long glass is the shallower DOF which is going to seriously reduce your keeper rate.
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