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02-08-2009, 11:32 AM   #31
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Great! Now let's see some samples.

02-08-2009, 02:35 PM   #32
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Only K10D.

6x7 1:4.5 75mm

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F 4.5

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F 4.5 (with flash)

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F 16 (with flash)
02-08-2009, 06:41 PM   #33
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QuoteQuote:
Baldeagle21b: I chose a 150mm f/2.8 in EX condition, based upon its reasonable price, mainly. It arrived on Friday and it is in excellent condition, as are all things from KEH in my experience. Should give the K20D a very purposeful appearance with that big glass hung on it, I think.
That is great because I do not have the 150mm glass and perhaps you will post here for us with that lens? I am lucky enough to own three 67 Medium format lenses: the late SMC Pentax 67 55mm f/4; the SMC Pentax 6X7 165mm f/2.8; and the late SMC Pentax 67 200mm f/4. The indoor shot I posted with the butterfly light is from the 165mm f 2.8.

I will post outdoor shots with all of these here when weather warms up a bit. I must agree, the Medium format lenses sure give the K20d a "very purposeful appearance."
02-09-2009, 03:04 AM   #34
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I'm still waiting for my adapter, but I'll see what can be arranged once it comes.

02-09-2009, 11:37 PM   #35
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Feverbeaver: I can see from your post you have selected a different adapter than I did. Where did you get yours? That 75mm f4 is one of the higher rated 67 lenses.
02-10-2009, 12:16 AM   #36
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Here is a shot with the SMC Pentax 200mm 67 f/4: @ 100 iso--f 11--3 seconds--PEF to JPG to Re-size for forum--no post processing--this lens allows focus to 1.5 meters

Last edited by Jewelltrail; 12-11-2009 at 10:58 AM.
02-10-2009, 03:25 AM   #37
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QuoteOriginally posted by Jewelltrail Quote
Here is a shot with the SMC Pentax 200mm 67 f/4: @ 100 iso--f 11--3 seconds--PEF to JPG to Re-size for forum--no post processing--this lens allows focus to 1.5 meters
Nice samples of what we can expect with these lenses. I think it's interesting how shallow the depth of field appears to be, even stopped down to f/11.
02-10-2009, 03:44 AM   #38
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QuoteOriginally posted by Ole Quote
A while back I developed this table - hope it helps.
Wow, APS-C is has almost exactly 10 less surface area than 6x7.

02-10-2009, 03:56 AM   #39
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QuoteOriginally posted by Jewelltrail Quote
Feverbeaver: I can see from your post you have selected a different adapter than I did. Where did you get yours? That 75mm f4 is one of the higher rated 67 lenses.
It is a selfmade adapter. One Rear Lens Cap 3rd-party, one old bayonet from a F 35-80 and the Auto Extension Tube 19mm.

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02-10-2009, 07:46 AM   #40
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QuoteOriginally posted by Jewelltrail Quote
Talk about the "SWEET SPOT"! The K20's outward persona takes on a new life in this garb. Here is a shot of the badboy, with my Super Program for comparison. Please forgive me for using a P & S for this
Appalled, personally I would have used a Leica D-LUX 4 to shoot that picture!
02-10-2009, 08:14 AM   #41
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QuoteOriginally posted by calicojack Quote
Wow, what a thought! Make up a back for my old field camera that I can mount my K10D onto, that will allow the K10 to be moved enough to cover the area of a 4X5 negative. Lets see, APS C is 16mm tall. That will have to be moved 6 times to almost cover the 4" height. APS C is 24mm wide. that will have to be moved 5 times to almost cover the 5" width. Then all that is left is to stitch 30 seperate exposures into 1. I guess the only possible real world use would be shoot in a studio. I bet the earth revolves too much in the time it would take to make 30 seperate exposures with 29 moves of the back to even think about an outdoor or live subject.
Interesting brain teaser though!
Brian
I made exactly what you are talking about one day. The problem is that you can't move the camera vary far off the lens axis before the camera body itself vignettes the sensor. I tried it with a film camera and got very little movement before vignetting, I suspect with a DSLR you will get a bit more movement possible, but I wouldn't be looking for a whole lot here.
If you want to do stitched panoramics, I think one is far better off to buy one of the specialized heads (gigapan), or just do what I do which is wing it.
02-10-2009, 03:13 PM   #42
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QuoteOriginally posted by Wheatfield Quote
I made exactly what you are talking about one day. The problem is that you can't move the camera vary far off the lens axis before the camera body itself vignettes the sensor. I tried it with a film camera and got very little movement before vignetting, I suspect with a DSLR you will get a bit more movement possible, but I wouldn't be looking for a whole lot here.
If you want to do stitched panoramics, I think one is far better off to buy one of the specialized heads (gigapan), or just do what I do which is wing it.
Good point! I never considered the "shadow" caused by the camera body itself.
02-10-2009, 10:48 PM   #43
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BaldEagle21b: Nice samples of what we can expect with these lenses. I think it's interesting how shallow the depth of field appears to be, even stopped down to f/11.
Yes, the shot does make it look like there is shallow depth of field, but I think that has more to do with the focus I used than anything else. Here are 4 more shots, with the SMC 200 f4 @ f4, f5.6, f8, and f11 all at 100iso. Not pping, just re-sizing of full image ofr forum. This lens is sharp wide open, and is very consistent throughout the range, with f8 perhaps the sweet spot. I really am psyched to get all these lenses outdoors, especially the f4 55mm, and shoot some landscape and big bokeh stuff.

Last edited by Jewelltrail; 12-11-2009 at 11:29 AM.
02-10-2009, 11:03 PM   #44
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Sorry, should have posted one @ %100 crop for the peepers. BTW, I have a very cheap tripod and just breathing on the K20, while depressing the shutter, sends it floating. I have done my best to get a secure shot but cannot be certain there is no shake.

@ 5.6

Last edited by Jewelltrail; 12-11-2009 at 11:29 AM.
02-11-2009, 08:26 AM   #45
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Someone with technical knowledge could step in here please...

Since medium format lenses have approximately half the resolving power of SLR lenses (30-45 lines per mm vs 60-90 lines per mm--depending on who does the testing and what the parameters are). Wouldn't that result in less sharpness than shooting with high quality SLR lenses?

I know that in analog form, since 6x7 system produces a much larger image--4.5x larger than 35mm--you need less magnification to print and thus "buy back" the resolution in reduced magnification to achieve the final print. I get that, but I also realize that digital doesn't translate quite as easily into "final print magnification".

So even if you are only using the center "sweet spot" of the MF glass, if that still has lower resolution than, say a Limited lens, wouldn't the Limited produce much sharper images than the 6x7 lens with adapter? Even "standard issue" DA lenses have higher resolving power than the best 67 lenses and thus should produce sharper images...

Again, someone with expertise please help!
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