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02-09-2010, 04:20 AM   #1
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Advice - Pentax 55mm f1.4

I am about to pull the trigger and purchase Pentax 55mm f1.4 as a prime for my K10d. Have found reviews ok, however some suggest backfocus an issue with the K10d. Before taking the plunge would be interested in any advice.

Also considered Sigma 50mm f1.4.

02-09-2010, 04:27 AM   #2
axl
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download russian hack and keep your K10 in permanent debug. I have sorted my problems with lenses this way. My 31 needs +130 and 43 needs +200. You'll get used to screen being brighter and it doesn't really drain much battery.

BR
Peter
02-09-2010, 04:37 AM   #3
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QuoteOriginally posted by Pentottawa Quote
I am about to pull the trigger and purchase Pentax 55mm f1.4 as a prime for my K10d. Have found reviews ok, however some suggest backfocus an issue with the K10d. Before taking the plunge would be interested in any advice.

Also considered Sigma 50mm f1.4.
It's most likely a camera issue. K10D, K20D and K-7 (and apparently K-x) all have a debug mode (undocumented in the case of K-x) in which you can tinker with AF per lens. In low light, my K20D hasn't been accurate with either the Sigma or the Pentax.
02-09-2010, 12:22 PM   #4
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My 55mm is out on the K10D but as mentioned I just keep the camera in debug mode. Needs about +120 on mine.

02-09-2010, 12:50 PM   #5
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SDM lenses generally seem to backfocus on the K10D. My 16-50 certainly does. I really think they should have fixed that in firmware.
02-09-2010, 01:44 PM   #6
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QuoteOriginally posted by Diffusion Quote
SDM lenses generally seem to backfocus on the K10D. My 16-50 certainly does. I really think they should have fixed that in firmware.
I wouldn't worry about that, if its true what everyone on this forum is saying about SDM lenses at the moment then every single one is going to suffer total failure and die (along with the attached camera and person using it).


I think I had better sell my 16-50, 50-135, 55 and 60-250mm before they all fail miserably.
02-09-2010, 03:05 PM   #7
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QuoteOriginally posted by Mike.P Quote
I wouldn't worry about that, if its true what everyone on this forum is saying about SDM lenses at the moment then every single one is going to suffer total failure and die (along with the attached camera and person using it).


I think I had better sell my 16-50, 50-135, 55 and 60-250mm before they all fail miserably.

Careful Mike that's heracy round these parts.

I've got 4 and an HSM and when they go supercritical they will probably take both of us out.
02-09-2010, 03:30 PM   #8
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QuoteOriginally posted by Oggy Quote
Careful Mike that's heracy round these parts.

Not to worry, it will all be forgotton soon and everyone will move on to something just as daft .. like wanting a FF Pentax body

02-09-2010, 05:56 PM   #9
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thanks Peter! Is the hack easy to manage? I am fairly tech savvy but wondering how easy this is?

thanks,

Michael
02-10-2010, 01:03 AM   #10
axl
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QuoteOriginally posted by Pentottawa Quote
thanks Peter! Is the hack easy to manage? I am fairly tech savvy but wondering how easy this is?

thanks,

Michael
easy to do. The link should still be lingering somewhere here on the forums.
It does play up a bit with Vista. If you're running XP you're OK.
Just download it, install it, plug the camera in follow the instructions provided in the thread on forums and tada... you're in debug.
With Vista it's all the same, except I had to plug the camera into PC turn it on and just then install the software, otherwise it wouldn't recognize it.
Anyway, it's like 30sec operation, and then you can reap the sweat rewards....

btw, I was trying DA*55 in shop yesterday. It needed +200um. But I have to say I like it! Good size, good AF (can't see why some say it's slow) and sharp even on f1.4...


good luck.
If you'll have problems PM me, I'll see if I can help

BR
Peter
02-10-2010, 01:15 AM   #11
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Worked fine on Vista for me .. just ran it as administrator.
02-10-2010, 02:59 AM   #12
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...btw, be aware of focus shift and other focusing problems. If you perfect your focus for wide open shots, you may make it less perfect for shots with a few stops difference.
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