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08-20-2010, 08:41 AM   #31
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Most photo viewers can show you the Exif info.
For Exif info in you're browser you have to install a Exif view program. You could install the freeware program IExif.
I am using that for a long time now and am still very satisfied with it. Very small program that does it job. I only have to right click on a picture in my browser to view the Exif info.

Exif viewer : Opanda IExif Viewer

Just download and install trough the above link.

08-20-2010, 09:01 AM   #32
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Here are the EXIF files in order of the pictures displated above.
Attached Images
         
08-20-2010, 11:09 AM   #33
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Exif info does looks ok. Only thing that could course such a large DOF is that the distance between you and you're "subject" is to large.

What was the distance between you and you're girlfriend?
08-20-2010, 12:01 PM   #34
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10 feet or less

08-20-2010, 12:16 PM   #35
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At 18mm, depth of field is pretty huge and unless you're close focusing, it's hard to get any sort of blur backgrounds, even with super wide apertures (which the kitlens isn't capable of anyway)

"blurring backgrounds" can be done in one or more of the following ways, they add up onto each other:
1.Using a wide aperture (small number like f/1.4)
2.Using a longer focal length (for the same framing (picture), 50mm would be more blurry than 35mm which would be more blurry than 18mm)
3.Focusing on close subjects (the closer the subject, the more the background will be blurred, compare the 20mm shots posted above in the four thirds forum, where the girl's head is shot at very close distances (probably 2 feet), to yours where you have 10 feet distance)

For your purposes, #2 and #3 seem to cancel each other out, as to use a longer focal length you'd have to stand farther back to get all of your girlfriend in focus, but this is just how the camera works... For my recommendations with the kitlens, try more like a shoulder + head shot around 40mm, and use the widest aperture you can get. you can also try shooting just the head at 40-50mm with the widest aperture you can, that should get you some bokeh. (I know shooting just the head is not what you want, but it will help you understand how it works)

As to which lens to get, i'd place my vote on the 50mm/1.4s, since that would help you understand more how to get blurred backgrounds.

my 2c

Last edited by Andi Lo; 08-20-2010 at 12:23 PM.
08-20-2010, 12:25 PM   #36
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Does the K-x has a DOF preview?
08-20-2010, 12:40 PM   #37
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QuoteOriginally posted by Andi Lo Quote
At 18mm, depth of field is pretty huge and unless you're close focusing, it's hard to get any sort of blur backgrounds, even with super wide apertures (which the kitlens isn't capable of anyway)

"blurring backgrounds" can be done in one or more of the following ways, they add up onto each other:
1.Using a wide aperture (small number like f/1.4)
2.Using a longer focal length (for the same framing (picture), 50mm would be more blurry than 35mm which would be more blurry than 18mm)
3.Focusing on close subjects (the closer the subject, the more the background will be blurred, compare the 20mm shots posted above in the four thirds forum, where the girl's head is shot at very close distances (probably 2 feet), to yours where you have 10 feet distance)

For your purposes, #2 and #3 seem to cancel each other out, as to use a longer focal length you'd have to stand farther back to get all of your girlfriend in focus, but this is just how the camera works... For my recommendations with the kitlens, try more like a shoulder + head shot around 40mm, and use the widest aperture you can get. you can also try shooting just the head at 40-50mm with the widest aperture you can, that should get you some bokeh. (I know shooting just the head is not what you want, but it will help you understand how it works)

As to which lens to get, i'd place my vote on the 50mm/1.4s, since that would help you understand more how to get blurred backgrounds.

my 2c
Any lens recommendations under $400 then now that it's clear what I'm trying to do?
08-20-2010, 12:56 PM   #38
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QuoteOriginally posted by theteerex Quote
Any lens recommendations under $400 then now that it's clear what I'm trying to do?
What you're trying to do (full body portrait with OOF background) is pretty hard to achieve with sub-400$ lenses (CMIIW, anyone). Adam's recommendation for the 70-200/2.8 would be what I personally go for if I want to do something like that; I would probably shoot it at 70-120mm around f3.2. That said, the 150$ 105mm/2.8 takumar might just do the job... The cheapest way to do this is the blur filter and selective masking in photoshop.

Like I said I'd probably recommend you to try one of the fast fifties

55/1.8 Takumar or the K-mount variant will run you around 30-70$

Or there's also the 50/1.7 and 1.4 siblings, for a little more money. I'd personally skip the f/2 version, although if you can find one, it would do you fine.

Pentax Normal Prime Lenses

I'd be inclined to try the 17-50/2.8 lenses such as those from Tamron and Sigma as well, 28mm at 2.8 would be blurred somewhat, although may or may not be as much as you want it.


Last edited by Andi Lo; 08-20-2010 at 01:02 PM.
08-20-2010, 04:30 PM   #39
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I thought we were playing with the "50mm f2 manual".
- TAKE THAT ONE!!!
- Full open en try 0 to 10 feet (make a picture every step you take, incl re-focus)
08-20-2010, 06:48 PM   #40
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At Ebay there are a huge number of 50mm lenses avaiable. F2 lenses as low as $10.-
F1.7 for some $50.-

Just search on "Pentax 50mm" at ebay
08-20-2010, 11:23 PM   #41
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Photo Critique - PentaxForums.com
- look at the people thread, all F 2 or smaller and typically 50 or longer
08-20-2010, 11:36 PM   #42
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QuoteOriginally posted by CWyatt Quote
Does the K-x has a DOF preview?
Yes it does. It is labeled as Optical Preview and assigned thru the use of the Green Button and is explained in Page 126 of the K-x operating manual.
08-21-2010, 12:17 AM   #43
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QuoteOriginally posted by creampuff Quote
Yes it does. It is labeled as Optical Preview and assigned thru the use of the Green Button and is explained in Page 126 of the K-x operating manual.
Oh I shoot with the K-7, I just mean it might be of use here.
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