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03-28-2010, 06:31 AM   #1
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Does such a lens exist or has existed?

I was looking online as to what cameras and photography was allowed at a local sporting event.

Anything attached to a SLR over 6 inches in lenght and/or 3 inches in diameter is considered professional photo equipment and is not allowed. I believe this is the standard m.o.

So my question is, is there a k mount lens that is 150mm or higher and is faster than an f4 with AF that fits under these draconian rules? I think I should look for something a little smaller to end any potential arguments of "well technically it is 6in" and then getting booted by security because they don't have a shadler ruler on them or a micrometer.

Both pentax and sigma have a 50-200mm starting f4 that meet the requirements. I would consider either one but I think they are classifed as kit lens, just can be sold sperately. I would just like something a little better.

Maybe a small 1.4 or 1.5 teleconverter (thinking of lenght added to the apperance) attached to my sigma 24-70mm might work if it can support the AF?

03-28-2010, 07:00 AM   #2
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Check out the lens specifications at

Camera Lens - Official PENTAX Imaging Web Site

SMC PENTAX DA 55-300MM F4-5.8 ED
Dimensions: 2.8 x 4.4" (71.0 x 111.5mm)
PENTAX DA Zoom Lens for Digital SLRs and Compacts: smc PENTAX DA 55-300mm F4-5.8 ED
I think that the 55-300 is going to be as good as you can get with Pentax. I would also check out Tamron and Sigma.
03-28-2010, 07:03 AM   #3
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55-300 might be a decent option

The DA 55-300 (or DA L) might be a decent choice, espeically if there is decent light. It's just under 4-1/2 inches (until you zoom it out to 300mm). The DA 55-300 can be purchased new outside the kit, not 100% sure about the DA L. If not, there are usually a bunch of new ones at any given time being sold by people who bought them as part of a kit but don't want/need them.

As for using a 1.4x, it should still be under 6 inches (again, until you zoom out at which point it would be way over anyway). I recall trying out my Tamron 1.4x with the 55-300 just to see the results. It's not terrible (IQ-wise), although you need a lot of light at that point. Below is a handheld shot I took when fooling around with that combo, taken at 300mm + 1.4x, iso 3200.

03-28-2010, 08:24 AM   #4
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the DA*200 is 83x134mm. 83mm diameter = 3.25" (so might be able to argue), and 134mm is 5.3" so you could have a decent candidate depending on how picky they are.

You'd be surprised how well-lit certain sporting events can be too. I took an F70-210 which is F5.6 at 210, and it was fine since the K100D has decent ISO 800.

03-28-2010, 10:26 AM   #5
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The SIGMA 50-150mm 2.8 is 3.0"x5.5" in size so that should fit your criteria. Plus it is HSM, though it is hard to find, and expensive.
03-28-2010, 10:37 AM   #6
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Note that the 50-200 and 55-300 are f/4 at the wide end, but that's not where you'd be using them mostly, I assume. On the other hand, I agree that for many events, you don't need f/4. For night games where you might want more speed, I'd give up AF if necessary to get the speed any day of the week, and twice (a double header) on Sundays. I'd probably bring my M135/3.5 or M200/4. The very well-regarded A70-210 officially clocks it at under 6 inches, but just barely, and depending on how they measure it, I could see it being rejected.

Last edited by Marc Sabatella; 03-28-2010 at 10:48 AM.
03-28-2010, 03:43 PM   #7
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Re: Does such a lens exist or has existed?

Well I just got back from a Cleveland Cavaliers game and I was able to get in with my old Phoenix/Samtang 70-210 f4-5.6 attached to my K200D and it just barely met the criteria.

Security ask you to extend the zoom on the lens and actually have a marker on a table that let's them quickly know if it is ok.

So the new dream lens would have to be under 6" extended, equal to or greater in zoom than 210mm, minimum of f4 ( but would prefer faster, ) and under 3" in diameter.

My old lens is junk compared to my modern Sigma and Tamron lens. The extending tube does not lock and is difficult to keep a fixed focus because so.

Everyone's suggestions have Bern most helpful.
03-29-2010, 01:05 PM   #8
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You can try mirror lenses but those are only feasible for daytime events.

Fortunately I never had to deal with such stupid rules but in your place I'd pop any small lens on the camera and carry the real deal in a bag. Or have someone else bring it in.


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