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Forum: Sold Items
05-28-2021, 07:11 AM
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My pleasure. And if I may brag for a moment, my Planar autofocuses :)
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Forum: Sold Items
05-28-2021, 06:53 AM
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I'm just gonna put in a bump because I think the Planar might be the best lens design in history, and if I didn't already have the G mount 45mm (I use it on an actual G2) I would consider selling a kidney for a k mount version. This is a very good price from a very reliable seller. I encourage anyone to look at the results you can get with this lens on an SLR body. Not fair to compare to rangefinders IMO because the rear elements can extend further into the camera bodies with no mirror in the way.
I think it would actually be fascinating to see a rangefinder vs SLR comparison of some of these Zeiss lenses. It seems clear to me that SLR versions preserve the 3D effect but the G mount version gives "sharp" a new meaning, at least when mated to the camera it was designed for and not mounted on a Sony with some hamfisted adapter by a skinnyjeans art student.
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Forum: Post Your Photos!
05-21-2021, 11:20 AM
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Yes they could cover a tree to thick you could barely see the bark that year. Walking around outdoors you felt like you were in a giant popcorn popper with these giant bugs popping into the air.
I'm told we can expect something similar in Washington DC this year, but I don't know if anything can match that Chicago summer.
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Forum: Post Your Photos!
05-20-2021, 07:11 PM
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The more I look at this the more I'm convinced the "white" parts of the grass look that way because of movement between pixel shift exposures. The tips of the stalks of grass are not actually white at all, they were just the fastest moving portions of the image. There is no way the grass held that still for the duration of time it took to get 4 snaps at 1/30.
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Forum: Post Your Photos!
05-20-2021, 03:32 PM
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Sounds right. I grew up in Chicago and vividly remember an explosion circa 1991.
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Forum: Post Your Photos!
05-20-2021, 02:01 PM
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Pic was taken with pixel shift activated, hence the white dots sprinkled about.
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Forum: Welcomes and Introductions
05-19-2021, 06:30 AM
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Prescient comment. Since starting this thread I've acquired 3 Spotmatics, a Super Program, a K-3ii and a PC35AF. Am mostly shooting the Super Program right now.
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Forum: Film SLRs and Compact Film Cameras
05-17-2021, 06:04 AM
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Hey I'm in your shoes, or about to put them on. I was thinking of picking up OM-1 precisely because of that 24mm lens. Still thinking about it actually and probably need to be talked out of it.
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Forum: Pentax K-3 & K-3 II
05-16-2021, 10:07 AM
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Thanks. I'm already getting good results with my scanning. What I don't like it's having to touch my camera at all once I have everything lined up. Will look into the options you suggested.
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Forum: Pentax K-3 & K-3 II
05-15-2021, 10:10 PM
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That's a shame. I don't know much about flucards but direct wifi connections are always dodgy in my experience. Seems like it would add more complexity than it's worth.
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Forum: Pentax K-3 & K-3 II
05-15-2021, 08:03 PM
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I realize there's already been some discussion of this, but I just acquired a K-3ii from another forum member and it seems a lot of info on this is stale. I am setting up a DSLR scanning studio, and while I have a perfectly good high end windows laptop I could tether to, I would prefer to stick with Fedora Linux, and ideally I would like to tether to my Raspberry PI and have it handle all communication with the camera. Looking into pkTriggerCord but I don't see active development for Fedora and I'm unsure what limitations I can expect with the Raspberry Pi. I'm not even sure it does what I'm looking for, which is effectively act as a wireless bridge I can use to connect to the camera without running USB cables to the terminal where I'm running Darktable.
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Forum: Film SLRs and Compact Film Cameras
05-10-2021, 08:10 PM
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3 Spotmatic SP's
SuperProgram
PC35AF
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Forum: Sold Items
05-09-2021, 07:56 PM
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Forum: Film Processing, Scanning, and Darkroom
05-04-2021, 07:31 PM
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Right I'm wondering what mods are required and whether it's worth the effort. Looks like you answered my question. Thanks.
So according to that review, a Pentax A 50mm 2.8 with .5x magnification fills half the screen. I'm be using the FA 50mm 2.8 with 1:1 magnification. Any reason this device wouldn't work straight out of the box? Seems it's within focusing range of the lens.
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Forum: Film Processing, Scanning, and Darkroom
05-04-2021, 09:22 AM
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Thinking about going this route. Should work with my DA 50mm f2.8. Spiratone also made an duplicator that was k mount compatible with an adapter.
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Forum: Pentax SLR Lens Discussion
05-04-2021, 08:08 AM
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Great setup Kobayashi. But since my negatives will be 6x6 I cannot get away with a setup like that. My thought is to mount the camera vertically on an old enlarger, swapping out the camera for the head and placing the negatives on a light table. Haven't decided how I'm going to block ambient light or frame my negatives. The vertical orientation should not place the same mechanical stress on the lens, and since I got the lens so cheap it won't break my heart it if it goes. The cheapest copies I could find of the DA 35mm were selling for twice as much as I paid for the FA 50.
For 35mm negatives it looks like the Nikon ES-1 will fit the 52mm filter ring on the FA 50mm 2.8. Since it can be used without spacers on 40mm and 60mm Nikon macros I assume it will work with the DA 50 on a crop sensor as well.
This is all sort of unfortunate because I'm simultaneously building an Ikea macro studio, and for that I will need a more conventional setup with bellows, but I will need an entirely different setup for scanning film.
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Forum: Pentax SLR Lens Discussion
05-03-2021, 07:22 PM
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I decided to go with the SMC FA 50mm F2.8 Macro. Located on in very good optical condition for $135. My thought is to hold the camera and lens steady and have the 6x6 negatives framed in such a way that they can be precisely repositioned for taking shots of different portions of the negative. I don't see the point in taking more than two images of any given negative. I have some time to think about lighting.
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Forum: Pentax SLR Lens Discussion
05-03-2021, 01:06 PM
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Thanks Steve, I think the DA 35mm macro is probably my best bang for buck here. I think this requires a lens designed for digital sensors, and any lens with better IQ will come at the expense of longer focal length. DA 35mm is not a high value lens because it's not FF compatible, but here is a unique scenario where FF is at a disadvantage, because FF with a 35mm lens would need to be kept further apart from the subject to extract the same amount of data I should be able to extract through the K-3ii, controlling for vibration. Of course you don't control for vibration in real life, because APS-C minimizes that, and in any case it looks like the DA 35mm macro can be had for less than the cost of a midrange flatbed scanner.
BTW I realize now there's an entire forum on this: Pentax Film SLR Discussion - PentaxForums.com My apologies to the moderators.
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Forum: Pentax SLR Lens Discussion
05-03-2021, 11:31 AM
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I want to give my sincere gratitude to those who have responded so far. Great info. But my most immediate concern is whether I need to look for another lens.
I will not have the Mamiya until July. I have plenty of time to plan this out and assemble a macro studio so that by the time I have the camera I will be prepared to quickly digitize the results. What I am trying to figure out is whether I need to budget for a different lens, because whatever studio I build will be built around that lens. It sounds to me like people have had success with the Pentax-A 100m f4, but if shorter focal length is preferable then I would want to know what is the best value lens at the shortest acceptable focal length. I would like my macro studio to be as small as possible, so if I can get away with 28mm that would be my preference. My Sigma will do 0.34x magnification at 20cm, but it's not a sharp lens. I'll pay a lot for a lens if I have to, but only if I'm getting value for money. I'm concerned about flatfield focus on any DSLR and I don't know how close to "perfect" I can get.
I feel like my Ricoh GR II had it, and it would be been fun to build a macro studio around that little lens and see what it could do. If there were a cheap point and shoot with a killer macro lens that that shot 14 bit RAW I would give it a go. I'm sure I can get a lens that will suit me for < cost of a new GR III (don't plan on shooting at f8 on a used one because the sensor is a dust magnet).
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Forum: Pentax SLR Lens Discussion
05-03-2021, 07:48 AM
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It's not that I think 24mp goes beyond the resolving power of the lens, but that if I have a pic that I think can benefit from DSLR scanning beyond 16mp, I will have it drum scanned. There is already no way for me to scan at 24mp due to difference in aspect ratio.
I figured with the 100mm lens I would need a tripod mounted rail but I am concerned about stability and haven't done enough macro work to know what to expect. Wouldn't it make sense to use pixel shift for such a project, and wouldn't pixel shift detect any movement that could affect sharpness? Or would the effect on pixel shift be undetectable at the level of movement we're talking about? I only ask because I have shot 100mm lenses on tripods using pixel shift without any detectable errors, although shutter speeds were in the 1/125-500 range
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Forum: Pentax SLR Lens Discussion
05-02-2021, 09:27 PM
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I'll be acquiring a Mamiya 6 later this summer, and "scanning" my negatives with my K-3ii seems like a vastly superior option over any dedicated scanner I can afford. However, macro lenses are suggested. I have two that technically qualify: a Sigma 28mm EG DG f1.7 and a Pentax-A 100mm f4 macro. I have a Ricoh GR II that would have been perfect but the electronics on it just bit the dust. I have a number of other good lenses in various focal ranges between 35 and 200mm. If there is a way to put my Takumar 35mm f3.5 to work for this it seems like a good performer in terms of edge to edge sharpness, but I wonder if I can effectively make do by framing the negatives such that they don't fill the whole sensor from top to bottom. 24mp seems like overkill. The only problem is that I'm already losing 20% of my resolution due to the fact that I'll be shooting square negatives on a sensor with 4x6 aspect ratio.
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Forum: Pentax K-3 & K-3 II
05-02-2021, 03:09 PM
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You nailed it exactly. Thank you. DOF bracketing sounds perfect and I'll try to research this a bit more before spamming the forum. I'm relatively new to digital photography and have never used an SLR more advanced than a Minolta X-700 until acquiring a K-50 a few months ago.
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Forum: Pentax K-3 & K-3 II
05-02-2021, 11:57 AM
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Of course this is the answer. I think I overcomplicated things in my head as I sit here testing lenses for CA. What I'm really trying to do should be called "aperture bracketing" and there's no reason a camera should have the ability to do such a thing automatically.
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Forum: Pentax K-3 & K-3 II
05-02-2021, 10:59 AM
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This may sound like an odd question, and maybe there's an obvious answer, but I'd like to set my K-3ii so that it does shoots a series of exposures at a range of apertures, holding ISO constant and adjusting shutter speed as necessary. I've screwed with custom settings so much that I'm not sure any of my program modes currently have anything like their default settings, and most of the time I'm shooting full manual anyway and I'm generally clueless about Sv, Tv and TAv mode FWIW.
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Forum: Pentax SLR Lens Discussion
04-30-2021, 05:03 PM
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The seal does not need to be perfect I suppose. It could be microfiltered. I do wonder why no manufacturer has addressed this. Even the RX100 has this problem.
---------- Post added 04-30-21 at 05:26 PM ----------
If only I could turn the camera on to test your theory. But I think maybe I was also confused. Canon makes an APS-C point and shoot with a zoom lens that is notorious for collecting dust. However you can literally drill a hole in the lens housing while it's extended and wipe off the lens with a swab. If the Ricoh lens moves it's only by the tiniest amounts and I don't think it creates enough of a vacuum to cause much trouble except that you have dust constantly entering the camera body through the control wheels.
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