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06-29-2009, 09:04 AM   #1
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Limited limited wobble

I've purchased the 21, 40, and 70 pancakes while waiting for my K-7 to arrive. Beautiful lenses.

I've noticed that the 21 and 70 have a slight wobble if I hold the base and touch near the top. It's a very limited wobble, but noticeable. The 40 is solid, no movement. Is this limited wobble normal?

Adam

06-29-2009, 09:41 AM   #2
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QuoteOriginally posted by Photong Quote
I've purchased the 21, 40, and 70 pancakes while waiting for my K-7 to arrive. Beautiful lenses.

I've noticed that the 21 and 70 have a slight wobble if I hold the base and touch near the top. It's a very limited wobble, but noticeable. The 40 is solid, no movement. Is this limited wobble normal?

Adam
you are going to have a beautiful kit that's for sure as soon as the K-7 will arrive

not sure about the wobble thou
06-29-2009, 09:53 AM   #3
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Since I don't have any pentax bodies (recovering Canon user), I sometimes hold the 21 to my eye and see the world upside-down while playing with the aperture lever...

Adam
06-29-2009, 10:28 AM   #4
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QuoteOriginally posted by Photong Quote
Since I don't have any pentax bodies (recovering Canon user), I sometimes hold the 21 to my eye and see the world upside-down while playing with the aperture lever...

Adam
What?!

Why do you have a DA 21 ltd if you have no pentax bodies? I'll trade you a few FD lenses I have laying around for it...

06-29-2009, 10:41 AM   #5
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QuoteOriginally posted by Photong Quote
Since I don't have any pentax bodies (recovering Canon user), I sometimes hold the 21 to my eye and see the world upside-down while playing with the aperture lever...

Adam
Worst case of LBA in the world :P
06-29-2009, 10:55 AM   #6
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I have the DA 21 because I'm waiting for my K-7 (as stated above). My LBA is more of a one time hit because I'm actually pretty poor.

Can someone answer my original question of limited wobble on limited lenses?

Adam
06-29-2009, 11:20 AM   #7
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QuoteOriginally posted by Photong Quote
I have the DA 21 because I'm waiting for my K-7 (as stated above). My LBA is more of a one time hit because I'm actually pretty poor.

Can someone answer my original question of limited wobble on limited lenses?

Adam
Many lenses have a degree of wobble due to some laxness in the focus helices. This generally does not affect performance unless it is pronounced. My FA 77/1.8 does not wobble, but my A 50/1.7 and M 50/1.7 along with my Jupiter-9 and XR Rikenon 50/2 do. The other lenses in my sig are tight.

Steve
06-29-2009, 11:42 AM   #8
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Thanks Steve. I wasn't sure what the wobble tolerances were on limiteds. As long as it's normal, no problem.

Adam

06-29-2009, 11:51 AM   #9
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QuoteOriginally posted by Photong Quote
I've purchased the 21, 40, and 70 pancakes while waiting for my K-7 to arrive. Beautiful lenses.

I've noticed that the 21 and 70 have a slight wobble if I hold the base and touch near the top. It's a very limited wobble, but noticeable. The 40 is solid, no movement. Is this limited wobble normal?

Adam
My 21 does that too. Just to be safe I sent it to Pentax service; they said the lens wasn't faulty and sent it back.

I wouldn't worry about it.
06-29-2009, 02:09 PM   #10
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My DA21 wobbles a bit too.. So does my FA31.. I would not worry.
06-29-2009, 03:12 PM   #11
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Just checked mine. 70 has a tiny bit, less than one mm. 40 is solid. 21 is not one I own yet.

mike
06-29-2009, 03:59 PM   #12
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I have a limited woble on my 40ltd. Nothing to be afraid of...
06-29-2009, 05:05 PM   #13
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QuoteOriginally posted by Photong Quote
Since I don't have any pentax bodies (recovering Canon user), I sometimes hold the 21 to my eye and see the world upside-down while playing with the aperture lever...

Adam
hahahaha...howdy bruddah!! I just defected from canon myself...over the past 10-ish days in fact. I was going to wait for the K-7 but bought a bunch of glass myself and, well, could not wait. Amazon has the K20D for just $639 right now and it's worth the price just to get back to shooting. At that price, I figure at most I lose $50 by the time I sell it in a few months. And really the K-7 will drop in price more than I lose on the K20D body so I come out ahead long term and still get to learn the Pentax system and differences from Canon gear.

Have fun but know you are NOT alone...I was a loyal and happy 40D user...until it was DC'd (offically-unofficially) a few weeks ago now --> no more firmware support in very short order, as soon as the DC'd status becomes offically-offical...the lure of Pentax's environmental sealing, at a price mere mortals can afford, on a prosumer/crop body was just too much of an attraction for me. The rest I can happily work around. Plus I find the typical Pentax image more appealing for some reason I cannot put a finger on...to me it looks much closer to film than other systems deliver.

Hope it is as fun for you too!!

EDIT: Oh, almost forgot, my 77ltd does not show any wobble. There is a very tiny bit of give, and I mean TINY, which is simply part of the design of anything mechanical. But it's not a wobble by any means. Hope your lens is OK fine!!

Last edited by brecklundin; 06-29-2009 at 05:10 PM.
06-30-2009, 07:42 AM   #14
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I had thought about getting the K20D to tide me over until the K-7 arrives but decided against it. I've been waiting my whole life for it, so I can wait 2 more weeks.

When I first opened the DA 70 box and opened the little coin sack, for a second I thought that I had bought a miniture model (perhaps a half scale model) of the real lens. After a few minutes, it became apparent that it was too functional to be a model. I can't wait to use it.

Adam
06-30-2009, 08:00 AM   #15
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I used to own a 21 and it's tight

I have borrowed a close friend's 43 and 77 before and the 43 has a tiny bit of wobble

From the quality of pictures I had with the 43, I think the slight wobble is nothing to worry about

I wonder if weather-sealed lenses like the DA* are all tight
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