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12-15-2007, 01:31 PM   #1
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Pentax FA 80-320 4.5-5.6

Does anyone own this lens? Is it any good? It wouldn't have the same focal length on DSLR right?

12-15-2007, 01:40 PM   #2
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I do but don't care for it much. Very soft on the high end. Very inexpensive. I just recieved the DA* 50-135 and hope to acquire a longer telephoto in the near future.
12-15-2007, 04:47 PM   #3
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yes

QuoteOriginally posted by tux08902 Quote
Does anyone own this lens? Is it any good? It wouldn't have the same focal length on DSLR right?
For the amount of money it'll cost you to get one (likely less than $200 gently used), yes for sure, I would recommend it. I used one for the better part of 2007 in all situations - indoor hockey to outdoor birding.

The previous poster commented that it's soft at the long end, and to a certain extent (say above 300mm), that is true. However, there are plusses. For starters, it's relatively light and compact. Secondly, it's able to hold F4.5 all the way from 80mm to 199mm (or so). After which, it only moves to F5.6 which is still quite useable if you're seeking low light performance at a higher ISO. Lastly, I liked using this lens for the simple reason that I could cover so much range if it were the only lens in my bag that day.

Rob
12-15-2007, 05:03 PM   #4
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I found the 80-320 a lot better than the 100-300.

Not as sharp as a 80-200 2.8 obviously, but the 80-320 takes decent photos for the price.

Go for it

Dave

12-15-2007, 05:14 PM   #5
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I used the silver copy of this lens for soccer photos and got some realy good shots of high school and college games. It is soft at the long end and a little slow in low light, but I learned to work with its limitations and I was very happy with it. It is better than my tamron 28-300 in my opinion. I used this lens with my k10d. Hope this helps you out some. Have a great day and Merry Christmas.
12-15-2007, 05:23 PM   #6
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How would it compare to the DA 50-200mm?
12-15-2007, 07:38 PM   #7
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QuoteOriginally posted by tux08902 Quote
Does anyone own this lens? Is it any good? It wouldn't have the same focal length on DSLR right?
Never used it, but lens focal lengths do not change. It is 80-320 no matter what. However, the "equivalent" range is 120-480 on a 1.5X crop-factor Pentax DSLR.
12-15-2007, 08:13 PM   #8
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Sorry, that's me getting ahead of myself.

12-15-2007, 08:21 PM   #9
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QuoteOriginally posted by SpecialK Quote
Never used it, but lens focal lengths do not change. It is 80-320 no matter what. However, the "equivalent" range is 120-480 on a 1.5X crop-factor Pentax DSLR.
I"ve used this lens quite a bit. If you want to see a photo take with one
check out this link in wikipedia:

Image:OregonBlacktail.jpg - Wikipedia, the free encyclopedia


I've uploaded there a photo of a deer taken with the K10. IF you dig down enough you can find it at full resolution.

Now, I have made some effort to compare it to the 300m A* F/2.8 prime (which I also own)
Not surprisingly the A* does better, but do understand that the deer photo
linked above was 'hand held' because deer don't always stand around and stare at you from 50 feet away, but I am not at all sure that under the circumstances, I could have produced a better photo with the A*.

the only clear no-no with the 80-320 is don't even think of using a 'doubler' with it.--
something routinely done with the A* 300.

PS, I have also a DA 50-200.--- Similar cost, less range, much smaller and lighter. I didn't like the 80-320 all that much with a light weight camera body (such as the late pentax film bodies because of balance--- the combination was nose heavy and awkward to use, and this might be an issue with the K100 to some extent, but with the heavier K10, the balance if fine, and my daughter gets the DA 50-200 for christmas and I'm keeping the 80-320.
'

Last edited by rvannatta; 12-15-2007 at 08:28 PM.
12-15-2007, 08:26 PM   #10
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It seems a little soft. Of course, I understand about the circumstances.
12-15-2007, 09:09 PM   #11
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QuoteOriginally posted by tux08902 Quote
It seems a little soft. Of course, I understand about the circumstances.
IT was pretty much pushing things to the limit----ISO 800, F5.6 -- 1/60th speed. hand held
at max zoom of 320. the foliage on the right is simply out of focus due to depth of field limitations. IT wasn't a preplanned encounter. I stepped out of my house and around the corner and found myself in a staring contest and happened to have my camera in hand.

the one thing I did do was instantly recognize that I was going to have depth of field issues
and I kicked the K10 over to spot meter auto focus and centered the photo on the left front shoulder (and ultimately cropped the deer into the proper position in the photo).
12-15-2007, 09:36 PM   #12
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I understand. Do you have anymore images that you've taken with that lens? I found a good listing on eBay and don't want to let it pass, especially since the lens covers a really nice zoom range.
12-15-2007, 11:31 PM   #13
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QuoteOriginally posted by tux08902 Quote
I understand. Do you have anymore images that you've taken with that lens? I found a good listing on eBay and don't want to let it pass, especially since the lens covers a really nice zoom range.
yes: Image:Fortrock1.jpg - Wikipedia, the free encyclopedia

This is a hand held scenic with decent lighting...... 1/250 -- f13 at 140mm. its posted full frame
full resolution.

They are common on ebay--- I sort of track them ----often sell $150 to $175 dollars.

for an embarassingly bad photo see:Image:Cvairport.jpg - Wikipedia, the free encyclopedia

I think the photographer (me) was a jerk.

Image:Scaler1.jpg - Wikipedia, the free encyclopedia

This one I think is pretty good of showing what to expect.-----hand held at 300mm

While I'm not absolutely certain, I believe this one was taken with the
DA 50-200 at 200

Image:Scaler2.jpg - Wikipedia, the free encyclopedia

---------------
12-16-2007, 02:45 AM   #14
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I bought this lens from one nice forumer here.

My copy has a stiff focusing ring but it does not affect the photos taken. Auto focus is also much slower than my DA50-200 and I would not use it to take pictures which require fast AF. But for general use, I think it is rather sharp in my opinion, even more so than the Tamron 70-300 DI which I borrowed from my friend. Oh..the lens make a lot of noise while focusing and it is rather embarrassing sometimes Other than that, I don't have major complains

Here are some photos for your reference:

Attachment 6723
Attachment 6724

Hope this helps

Last edited by raider; 01-11-2009 at 09:03 PM.
12-16-2007, 10:39 AM   #15
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I use this lense for a lot of my motorsports shots....it's not the greatest, but fr the money and the length I use it a lot. It's perfect for what I do.
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