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Forum: Pentax K-1 06-27-2016, 07:17 PM  
K-1 and FA43 Limited
Posted By Jerry Thirsty
Replies: 53
Views: 13,456
I haven't been using it in AF so can't talk about FF/BF. On my copy, I find that it is very soft all over until f/4, and f/5.6 is preferable. The interesting thing is that there is almost no visible diffraction effect from f/16 to f/22, so I would be fine using it at minimum aperture for DOF.
Forum: Pentax Film SLR Discussion 04-29-2010, 06:43 PM  
Why can't DSLR's have DOF Calculators?
Posted By Jerry Thirsty
Replies: 15
Views: 4,146
Back to the OP's question, I suspect that the reason is because lenses don't have encoders to tell the camera what absolute distance they are focused at. So the camera can't calculate the near and far limits (assuming they gave you a way to choose your circle of confusion in the config settings).

Theoretically they could put in an app that would let you manually enter your estimated distance and then calculate a d.o.f. range based on your current focal length and aperture and display it on the rear LCD. Maybe it's just too old school for them to put any effort into it.
Forum: Pentax DSLR Discussion 02-10-2010, 06:12 PM  
K-x focus adjustment…it’s worth checking.
Posted By Jerry Thirsty
Replies: 23
Views: 17,692
Okay, I just tried it again on another computer using Notepad, and it still worked. Be careful that you don't let Notepad tack on a .txt extension on the end (which is what it will do by default), and obviously it should be saved at the root directory of the card, not in the DCIM folder.

But, whatever works for you. Have fun.
Forum: Pentax DSLR Discussion 02-10-2010, 05:03 PM  
K-x focus adjustment…it’s worth checking.
Posted By Jerry Thirsty
Replies: 23
Views: 17,692
This isn't true. I made my own file in Wordpad (or maybe Notepad), and as long as you remember the carriage return it works fine.
Forum: Pentax DSLR Discussion 02-08-2010, 05:01 PM  
K10D and KX. I have both, Which do I keep?
Posted By Jerry Thirsty
Replies: 21
Views: 3,835
I have both. And I haven't picked up my K10D in a couple of months, if that tells you anything. But part of the reason is that I like walking around taking pictures handheld at night, at which the K-x beats the pants off my K10D. But I do admit that I find the dumbed down controls annoying. I just put up with them for the image quality. If they transplanted the K-x sensor and processing into the K7 body I'd buy a couple.
Forum: Pentax Film SLR Discussion 11-09-2009, 06:21 PM  
Kodak 400 BW C41
Posted By Jerry Thirsty
Replies: 3
Views: 3,661
BW400CN is the current product. Googling for 400BWC turns up very few hits, mostly foreign, so I'm going to go out on a limb here and say maybe it was a repackaging for other markets?

Personally I'd go for Ilford XP2 Super over BW400CN, but that's just because I like to print it myself in the darkroom. Assuming you aren't, it looks like the Kodak is a fair bit cheaper.
Forum: Photographic Technique 10-28-2009, 05:25 PM  
My first star trail shot came out doubled?
Posted By Jerry Thirsty
Replies: 25
Views: 7,777
If it were zoom creep the second set of arcs would still be concentric with the first, and you'd probably have radial lines or ramps joining them. I would say the camera/support moved and quite quickly too.

If you look at the bright white and blue short trails that are almost horizontal in the upper right, you will see they are the same stars that form the white and blue arcs below them near the bottom. And the three bright short blue arcs in the upper half to the left of center match the blue stars at the bottom as well.
Forum: Pentax News and Rumors 10-19-2009, 06:05 AM  
Pop. Photography Reviews K-7
Posted By Jerry Thirsty
Replies: 58
Views: 9,570
While I don't have extensive experience with Nikon, a few months ago I got an N80 (1990s film SLR) and while I didn't do any real testing, the thing that struck me immediately was that it appeared to focus noticeably faster than any Pentax AF body I have ever used (ZX-5n, MZ-S, Ist D, DS, K10D). It's possible that this might also be due to differences in lens design, or allowed focusing error, but it seemed to do the job. I was able to track my dog running at full speed that I know from experience would have been hit-or-miss with my Pentaxs. Assuming Nikon hasn't cut too many corners in the intervening years, I can't say that it would really surprise me if Nikon AF still has an edge.
Forum: Pentax Film SLR Discussion 10-05-2009, 06:38 PM  
Expired Film
Posted By Jerry Thirsty
Replies: 6
Views: 1,861
It's probably fine. I usually don't get concerned until it's 3 or 4 years expired. Just developed a roll of 3 year expired Sensia 400; there's probably a bit of a color shift but I can't see it.
Forum: Pentax News and Rumors 09-11-2009, 06:01 AM  
DA limited lens-hood rumor
Posted By Jerry Thirsty
Replies: 10
Views: 4,564
Wow! I had no idea there was that much stuff packed into a Graflex flash handle.
Forum: Pentax Film SLR Discussion 08-14-2009, 05:49 AM  
MX or LX or PZ-1P ? Just want to use film...
Posted By Jerry Thirsty
Replies: 15
Views: 4,459
Well the LX is going to be the most expensive of the three, and there's a good chance it will need an expensive overhaul before it will really live up to its' full potential. The MX and PZ1P cost about the same, so it just comes down to small manual vs. large electronic. Check KEH and eBay completed auctions for prices; KEH will usually be about 15-20% higher than eBay, but sometimes you're better off paying the extra than buying from some guy who "doesn't know anything about cameras, but this one appears to work".
Forum: Pentax Film SLR Discussion 08-10-2009, 04:11 PM  
LX - Q from new owner
Posted By Jerry Thirsty
Replies: 6
Views: 3,428
Another easy way to tell if the mirror rest foam has decayed is to take the lens off and flip the mirror up (mirror lockup, or set to B and hold the shutter button). On each side of the mirror box, near where the bottom of the mirror would be when it is down, there is a little round cylinder of black foam sticking out from the walls. If the cylinder has an indentation in it (and it may be shiny) then the foam throughout the camera is turning into goo and needs to be replaced.

I had mine replaced and overhauled by Pentax Service in Colorado about a year ago; it cost about $300.
Forum: Pentax DSLR Discussion 07-24-2009, 04:42 PM  
ist DS shutter button problem - no contact.
Posted By Jerry Thirsty
Replies: 54
Views: 13,808
After my DS died, I tore into it a bit and took some pictures. The shutter button just has a plastic nub that goes through the camera top plate

thirsty : photos : Forum Examples

and pushes a switch underneath (the gray square on the orange circuit board):

thirsty : photos : Forum Examples

As you can see, you'd either have to replace the entire flex circuit or solder a new switch onto it (assuming the switch is the problem).
Forum: Photographic Technique 07-21-2009, 05:17 AM  
Why I HATE Umbrella Lighting...
Posted By Jerry Thirsty
Replies: 103
Views: 28,170
When I think "umbrella lighting" there is only one image that sticks in my mind:

Strictly Commercial
Forum: Pentax Film SLR Discussion 07-14-2009, 04:21 PM  
KM needle meter movement
Posted By Jerry Thirsty
Replies: 3
Views: 1,926
That needle meter is used in the KM and K1000. They eventually get sticky, and are pretty much completely unreliable at that point. A CLA would get it going again, but not worth it if the auction wasn't what you wanted anyway.
Forum: Pentax Film SLR Discussion 07-13-2009, 03:59 PM  
K2 Going Rate?
Posted By Jerry Thirsty
Replies: 10
Views: 2,241
Sounds about right, if it and the lens are in good working condition. You could maybe talk him down $10 or so.
Forum: Pentax DSLR Discussion 07-08-2009, 06:02 PM  
Full Frame body solution?
Posted By Jerry Thirsty
Replies: 12
Views: 2,355
Nope, looks like you've got it covered. But by the time Pentax brings out a full frame, the sale of your 5D won't earn you much toward the purchase price. You might want to look around on the intertubes to see what the Canonites have to say about using your lenses on it; whether there are color problems in the corners or light falloff due to the non-telecentric designs of the old lenses.
Forum: Pentax DSLR Discussion 06-14-2009, 08:52 PM  
Remote control of istDS without lens possible?
Posted By Jerry Thirsty
Replies: 12
Views: 2,214
IIRC, Remote Assistant version 1.x (which was produced for the ist D, not the DS) didn't work very well with the DS. Most of the controls didn't work from the computer, although firing the shutter button did. I think I had to use Manual mode and select aperture and shutter speed from the camera, not the computer. Also, there was one issue that I had; I think it was that you couldn't turn on the camera LCD after you had connected it to the computer. Which meant that you had to make any menu and function changes before you connected.

I have never tried the version of Remote Assistant that came out with the K10D on the ist DS; maybe that one has full functionality?
Forum: Pentax Film SLR Discussion 05-26-2009, 10:39 AM  
Recommended replacement for a Program A
Posted By Jerry Thirsty
Replies: 9
Views: 1,736
Unless you can find a seller who really knows the camera they are selling, I'm going to argue in favor of getting your Program A fixed and overhauled. It may cost a bit more than getting another one, but I'd say the odds of it lasting a couple more decades are better.
Forum: Pentax Film SLR Discussion 05-16-2009, 06:50 PM  
Old Bulk Expired Film Score - any hints
Posted By Jerry Thirsty
Replies: 18
Views: 7,303
Not really. You're going to have to spool some short rolls of them and do some testing. The Kodalith is listed in the Unlisted Data section of the Massive Development Chart:

Digitaltruth Photo: The Massive Dev Chart

but even that is suspect considering the age of what you have.
Forum: Pentax Film SLR Discussion 05-11-2009, 05:41 AM  
Need Spotmatic Clarification
Posted By Jerry Thirsty
Replies: 24
Views: 6,129
I could be wrong, but I think all Spot Fs are labeled in both places. For example:

Forum: Pentax News and Rumors 04-29-2009, 04:41 PM  
is this pic of K30D?
Posted By Jerry Thirsty
Replies: 4,086
Views: 1,277,083
Not sure what you mean. The first one's an *ist D.

[edit] Never mind. For some reason it didn't load the lower image on my browser the first time I clicked.
Forum: Pentax News and Rumors 04-20-2009, 06:04 AM  
is this pic of K30D?
Posted By Jerry Thirsty
Replies: 4,086
Views: 1,277,083
Personally I prefer the angular/faceted aesthetic over the amorphous blob school of design. I think they are linked in my mind to the whole metal vs. plastic argument. The flat planes and sharp(er) edges of this model evoke classics like the MX, LX, MZ-S, whereas the more rounded shapes of the K* recall 1990s wunderplastik. And although I'm well aware that plastic is not necessarily a worse choice than metal, we've seen that Pentax can have problems implementing it (i.e. the cracking base plates on the PZ-1p and K10D). I look forward to seeing this one in the flesh.
Forum: Pentax Film SLR Discussion 11-11-2008, 04:57 PM  
ZX Owners
Posted By Jerry Thirsty
Replies: 7
Views: 1,880
I was digging through the clearance bin at a store a couple months back, and found one NIB for $2. So I got it, even though I rarely use my MZ-5n any more, and don't care for grips. But I also don't care for keeping spares of the little lithium batteries the MZs run on, so it may come in handy.
Forum: Pentax Film SLR Discussion 10-20-2008, 06:49 PM  
Three screw mount cameras compared
Posted By Jerry Thirsty
Replies: 11
Views: 5,603
I was looking for a Yashinon 50/1.4, and it came with a free TL Electro X attached. Since I wasn't too concerned about taking care of it, I took it out in the rain a couple of weeks ago. There's some pics here:

Yashica TL Electro X Sample Images Photo Gallery by Jerry Thirsty at
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