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04-16-2011, 03:18 AM   #1
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Have a K x ,love it ,but

I would like to add a telephoto lens , even if it is manual ,just to get started .It's the mounts that are confusing me any Ideas?

04-16-2011, 04:51 AM - 1 Like   #2
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QuoteOriginally posted by litboat Quote
It's the mounts that are confusing me any Ideas?
Well just get a K mount lens...or an adaptall and a k mount adapter...or an m42 and a m42 to K mount adapter.

It all depends of your budget really..and you particular interests, the telephotos can range from a short 70mm one to an extreme 500mm and it all depends on what you pretend doing with it.If you are unsure and want to experience different tele focal lenghts get yourself a Zoom. The DA 55-300 is highly regarded and it ain't very expensive...then there are some old zooms that are praised too (some off brand ones you may find for a very reasonable should look in the Adaptall club and the vivitar club for example). If you precise a litle bit more we can be of more help
04-16-2011, 05:43 AM   #3
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QuoteOriginally posted by litboat Quote
I would like to add a telephoto lens , even if it is manual ,just to get started .It's the mounts that are confusing me any Ideas?
Good points about the different mounts above!

Personally, I would stick with manual focus K mounts for now. I would also look for a zoom with the "A" (auto aperture) setting on the aperture, this would allow you to use a manual focus lens in Av mode. If you cannot find one with the auto aperture setting, then you will need to use Manual mode and green button...

I think you can pick one up for pocket change and some a very good...
04-16-2011, 07:09 AM   #4
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For a first telezoom IŽd suggest DA 55-300. DA L is cheaper but quick shift and metal mount are great to have with that lens.

04-16-2011, 07:13 AM   #5
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QuoteOriginally posted by Pen-A Quote
For a first telezoom IŽd suggest DA 55-300. DA L is cheaper but quick shift and metal mount are great to have with that lens.
This, or even the 50-200mm which is slightly cheaper but almost as good. I've been very happy with mine at 135mm at the zoo.

04-16-2011, 07:27 AM   #6
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QuoteOriginally posted by HEEGZ Quote
or even the 50-200mm
+1 there...and if you are able to find the Samsung version you will get a Good lens, cheap, with metal mount and quick shift (that is by most accounts identical to the pentax one).
A pair from the Samsung version:


I found this lens in exelent condition (i.e. unboxed but new) for 70€.
04-16-2011, 07:49 AM   #7
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+1 on the 55-300mm.

Good information above. The only thing I can add is if you decide to go the eBay route for third party lenses, you need to be aware of the infamous "Ricoh Pin" which may get a lens stuck on a Pentax dSLR such as the K-x. If the mount designation has an "R" somewhere (i.e. P/K-AR, RP-K, RK, etc.) these will have it.
Check this article:theatre of noise: Ricoh Lenses On Pentax Cameras -- The Ricoh Pin Fix
In case you haven't come across it: Pentax K mount - Wikipedia, the free encyclopedia

04-17-2011, 04:25 PM   #8
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Add another vote for the 55-300. I have the DA-L version and it's very quickly become my favourite lens!
04-18-2011, 01:09 AM   #9
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If you're willing to use a manual aperture and focus lens, you can get Pentax M 135mm f3.5 or a M 200mm f4 on Ebay.

SMC Pentax-M 135mm f/3.5 Camera Lens | eBay ~ $60
Pentax SMC-M 200mm F/4.0 Lens - Pristine - Prime Lens | eBay ~$80

Heck, I was tempted to pick up that 200mm, but I really don't need it. And I've already got a K(f2.5) and M 135mm and love them both.

[edit]I forgot to mention that, in addition to the lower cost, these lenses are also pretty darn small for their focal lengths.

Last edited by wasser; 04-18-2011 at 01:18 AM.
04-18-2011, 05:36 AM   #10
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Pentax A 70-210 f/4.0

Manual focus but auto aperture. Sharp for a zoom throughout the entire zoom range. Many complain about zoom creep on this lens but if you roll back the rubber coat on the barrel and tighten up on the screws you will not have a problem. Excellent color rendition, very good contrast. Also has a "Macro" function (read close focus) at the 70mm end. And the best bokeh of any zoom I own. Check out the user reviews here

NaCl(Constant F4 and it's cheaper than either the 55-300 or 55-200)H2O
04-18-2011, 07:35 PM   #11

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You have to judge whether you can or want to focus manually, and then decide accordingly. The 50-200 particularly is not hugely more expensive most manual lenses, and is much smaller than most of the full-frame compatible lenses. It's just a question of your own priorities. If you do get a used, non-Pentax lens, be wary of the infamous KR pin, discussed in various posts here on the forum.

04-20-2011, 12:20 PM   #12
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There are lots of options from many brands in this websites 'lens database'... Read the reviews and search ebay (add the word 'pentax' to 3rd party brands) for a gauge on prices...

Do they have 'carboot sales' in the US? I find loads of old camera stuff at carboots for pennies!!
04-20-2011, 12:48 PM   #13
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I will add my support to the above.
For economic but very effective AF lens try either DA50-200 or DA55-300. Excellent value for money.

Personally for MF lens I would recommend Pentax M 135 3.5 or you could try getting hold of a Pentax M 200mm. They are not that expensive. Have a look in the Marketplace, there is a 135:3.5 listed now .

Best of luck.
04-20-2011, 12:54 PM   #14
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Hi litboat,

I own and can endorse the DA 50-200, DA 55-300, and A70-210 f4. All of them are very good value for the money, with the A70-210 and DA 50-200 as exceptional bargains, IMO.

With the A70-200, you get a very good zoom optically, and though it's criticized as being rather large and heavy, a constant aperture and 1 stop faster (f4 vs f5.6) at the long end never comes without a size and weight cost. It's also got metal construction and is built like a tank. It typically sells for under $100 and is very commonly found on the used market.

The DA 50-200 is very good (I have heard of a few not-too-stellar copies though), is tiny and very lightweight for the FL range. It also has AF and Quick Shift, which to me is a big advantage in an AF lens. Since this is one of the "kit" lenses often sold with a new body, many who look for a longer or wider range alternative go for the DA 55-300 or DA 18-250 and sell their kit lenses at bargain prices. With this lens, I'd look for the DA 50-200 or DA 50-200WR versions as they come with hoods and metal mounts and have Quick Shift focusing while the DA-L 50-200 has not hood, a plastic mount, and does not have Quick Shift. IMO, the hood and QS (and WR of course) are worth paying more money for, the plastic mount probably doesn't make much difference in normal use.

04-20-2011, 01:00 PM   #15
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There are many good suggestions here, which also means you have many good options! Personally, I have found the 50-200 a very nice lens, it is compact and light. The same would go for the 50 to 300 being just a bit longer. As I like to set my exposure and forget about it (I purposely work in manual most all the time) I also have a nice Tamron 80-210 with a PK adapter that I picked up for $40 total. It has a constant aperture (f3.5) so at the far end of the range (210mm) I am over a stop brighter than the 50-200 or 50-300.

Search eBay and the market place for something that fits your budget. Make certain you look at the description of the lens for its overall condition, and read the details. If the seller says there are "no dents or dings" and the aperture blades are"snappy", if there is no fungus or haze, then you are 99.9% good-to-go! And if you buy a lens from eBay, make certain you rate the seller. They want good ratings and they (eBay) try to police the vendors to make certain they are not pulling any tricks.

Good luck!

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