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07-02-2008, 09:14 AM   #1
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Pentax newbie (?) question

Hi, I am possibly on the verge of buying the K10D as my first DSLR after much thought and researching and have one final question really. I use a wide angle for most of my photos and was wondering what was available for me to use with the K10. I use a 24-72 lens at the moment which suits but perhaps I would like to budge the 72 up a bit. So any recommendations ?

many thanks, BARCUD

07-02-2008, 09:32 AM   #2
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The nice thing about Pentax DSLR's is that they will work with any lens Pentax ever produced. The older M-style will need a little adapter but they will work. The AF will obviously not work with older manual focus lenses, but you can over-ride it.

So you can choose from any wide angle Pentax ever manufactured! How's that for selection!
07-02-2008, 09:39 AM   #3
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DA 10-17/3.5-4.5 Fish-Eye ED [IF]
DA 12-24/4 AL ED [IF]
DA 16-45/4 AL ED
DA* 16-50/2.8 AL ED [IF] SDM
DA 17-70mm f/4 AL [IF] SDM
DA 18-55/3.5-5.6 AL II

as well as any wide angle prime and zoom K mount lens pentax has ever made (with some restrictions on some) and any wide angle prime in m42 mount (with adapter)

PENTAX Digital SLR - The New Classic
http://www.pentax.jp/english/imaging/digital/lens/roadmap.pdf
Welcome to Bojidar Dimitrov's Pentax K-Mount Page
07-02-2008, 09:48 AM   #4
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Budge the 72 up a bit?
There's the Sigma 18-125 or Tamron/Pentax 18-250.

07-02-2008, 09:55 AM   #5
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Hi BARCUD

How wide is W...I...D...E ? Sigma's rectilinear 10-20mm HSM wide-zoom offers stunning value IMO, if the cost of Pentax's 12-24mm offering is too rich for you ! I also own a Tamron 18-250mm, but it's not very often that I find myself going past the 18mm end of it for landscape photography. Just a thought.......

Best regards
Richard
07-02-2008, 10:01 AM   #6
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I guess it is worth mentioning that Pentax DSLR has 1.5x factor so your 24-72mm lens will become 36-105mm. Not that wide anymore. You will have to get a new lens if you want to retain the 24mm at the wide end.

I would recommend Sigma 17-70mm as the walkaround lens. Pretty sharp, decent aperture and very versatile zoom range.
07-02-2008, 10:10 AM   #7
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thanks

thats a lorra lorra lenses to choose from !!!

I probably didn't explain myself properly but the 24-72 is the focal length on my current compact and not a lens as such.

I had the Sigma 17-70 in mind with the K10 as it is right within my budget and its good to hear I might be on the right track.

As for lens' I'm still trying to get to grips with the different equivelents. Involves numbers you see ! not my strongest point !

I will certainly check out reviews on the lens' that have been suggested .

thanks again, BARCUD
07-02-2008, 10:20 AM   #8
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The Sigma 17-70 is pretty well regarded. If you want to stick with Pentax, their new 17-70 f/4 will be available soon, but it's priced higher.

On a side note, a compact camera that can reach a 24mm eq FOV is a rare beast indeed. Good find!

07-02-2008, 10:33 AM   #9
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QuoteQuote:
As for lens' I'm still trying to get to grips with the different equivelents. Involves numbers you see ! not my strongest point !
thats why I only mentioned DA lenses that way the focal length presented is the actual focal length you will get.

to determine the field of view of a 35mm based lens on a 1.5x sensor: lens focal length * 1.5

to determine what focal length you need to achieve the field of you you want: focal length / 1.5


for example:
a 24mm full frame lens on a 1.5x crop sensor camera will yield a 24mm focal length with a field of view of a 36mm lens.
to get the 24mm field of view you will need a 16mm lens but it will not have the magnification of the 24mm.


the thing to keep in mind is whether or not your lens is designed for a crop sensor or 35mm 'full frame'

none of this actually has anything to do with the actual focal length you will get, just the field of view. (some people get confused with the 'focal length multiplier' aspect) so if someone tells you your 70-300mm will be a 105-450mm you wont actually get the 450mm magnification!

Last edited by séamuis; 07-02-2008 at 10:43 AM.
07-02-2008, 10:38 AM   #10
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Hi , yes I use the Ricoh GX100. I thought of the Sigma really because I also want to try and get a bright lens, 2.8 sounds okay to me.
07-02-2008, 12:30 PM   #11
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QuoteOriginally posted by navcom Quote
The nice thing about Pentax DSLR's is that they will work with any lens Pentax ever produced. The older M-style will need a little adapter but they will work.
The M lenses do not require an adapter.

You're thinking of the M42 (screwmount) lenses.
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