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07-09-2011, 09:09 PM   #1
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kx mount

so just wondering what mount is the kx and what kind of lens can i use

07-09-2011, 09:44 PM   #2
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Hi. If you mean the K-x dSLR then K-mount lenses are what you're after. K, KA and KAF lenses are all included.
07-09-2011, 09:58 PM   #3
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You can use any lens with a Pentax PK bayonet mount, like the K, KA and KAF lenses that Ash mentioned. (Those are the names of the lens mounts -- the lenses themselves will have prefixes like DA, DFA, FA, F, A, M, etc.) With an M42-PK adapter, you can use any M42 screwmount lens, including all the famous Takumar lenses, and many many more. With a bellows or other extension, you can use many enlarger lenses and similar no-focus glass. Read the forum contents here and you'll find thousands of possibilities. Have fun!
07-09-2011, 10:43 PM - 1 Like   #4
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In other words, any lens listed here under the first 2 headings:

Pentax Reviews - Pentax Lens Reviews & Comprehensive Database

The remaining Pentax lenses (m42, 645, 6x7) can all also be used with adapters.

Here's some info on Pentax's lens nomenclature: Pentax K-Mount Lenses Explained: The differences between various Pentax lens series


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07-09-2011, 10:47 PM   #5
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+1 with the above posters.

QuoteOriginally posted by RioRico Quote
Pentax PK bayonet mount
In Adorama, B&H, Keh and other photo shops, look for the Pentax bayonnet lenses. The choice is vast and numerous.

Last edited by hcc; 07-09-2011 at 11:59 PM.
07-10-2011, 04:10 AM   #6
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This page has been very helpful to me: The Pentax Camera Lens Compatibility Chart

The Pentax K-x is found second to bottom
07-10-2011, 01:12 PM   #7
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Thanks its kinda confusing for a first timer but i hope to learn more here in this forum....
07-10-2011, 03:22 PM   #8
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Oh yeah, there's much to learn, an overwhelming infinity of info really. But just to start, there are the basics of photography -- exposure and composition -- and the basics of lenses.

We have autofocus lenses (AFLs) and manual-focus lenses (MFLs). All Pentax AFL's have PK bayonet mounts. AFLs' names start with D or F and include their focal length and maximum aperture, like DA35/2.4 or FA50/1.4 or DFA100/2.8M (macro) or F35-70/3.5-4.5. (That last is a 35-70mm zoom with a maximum aperture that goes from f/3.5 at 35mm to f/4.5 at 70mm).

MFLs may have PK bayonet mounts or M42 screwmounts. Bayonet MFLs have names starting with A or M or nothing (but often called K). Pentax M42 screwmount lenses are named Takumar, called Tak for short, and may be Super- or Tele- or Macro-Takumars. Super-Taks are often called ST for short. With A-type lenses, like A50/1.2 or A70-200/4, you can control the aperture from the camera. With K- and M-type and M42 lenses, you must spin the aperture ring manually.

All the PK bayonet mount lenses, K- and M- and A- and F- and FA- and DA-type, will fit easily on your camera. A-type and AFLs (F, FA, DA) are the easiest to use. M42 screwmount lenses need a simple piece of hardware called an M42-PK adapter. M42s and F- and M-type lenses may require a little more work to use. But such older MFLs are often prized for their great optics, good feel, and relatively low prices.

Ah, price. In the last 3 years I have accumulated about 215 lenses, of which 10 are autofocus, mostly bought new. The other 205 are MFLs of various sorts, almost all bought used. The AFLs cost an average of US$285 each. The MFLs cost an average of US$20 each. Guess which I can afford? NOTE: I've sold another 110 lenses to help pay for the keepers. I deal on eBay, selling lenses so I can buy yet more lenses. Yes, I am an optics junkie.

But I digress. That brief introduction to Asahi Pentax lenses and their names should help you find your way through the lens review database and some discussions here. Have fun!


Last edited by RioRico; 07-10-2011 at 03:31 PM.
07-15-2011, 08:05 PM   #9
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Will lens from the k7 work for the kx
07-15-2011, 08:19 PM   #10
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QuoteOriginally posted by jolipares1438 Quote
Will lens from the k7 work for the kx
Yes, it will. If you used it on your K7 it will work on your K-x.
07-15-2011, 09:11 PM   #11
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what you guys think of this lens? *SIGMA 28-80mm f/3.5 Macro II Aspherical Lens
07-16-2011, 12:10 AM   #12
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QuoteOriginally posted by jolipares1438 Quote
what you guys think of this lens? *SIGMA 28-80mm f/3.5 Macro II Aspherical Lens
Read the reviews here.
07-17-2011, 08:43 PM   #13
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Whats a good low lights lens
07-17-2011, 09:59 PM   #14
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QuoteOriginally posted by jolipares1438 Quote
Whats a good low lights lens
Any Pentax-compatible lens with maximum aperture greater than f/3.5, in my opinion.

For example, smc M 50mm f/1.4, DA* 50-135mm f/2.8, and FA 31mm f/1.8 AL Ltd.

But that's just for the aperture. As for picture quality produced by the lens, it depends. Though the three I mentioned are really, really good.
07-17-2011, 10:10 PM   #15
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QuoteOriginally posted by jolipares1438 Quote
Whats a good low lights lens
That depends. How low is the light? What do you want to shoot? Does it move, or just lie there? How do you want to shoot it? How much do you want to spend? Do you caare about image quality? What camera do you have? Give us some hints, eh?
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