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Forum: Troubleshooting and Beginner Help 6 Hours Ago  
Pentax K500 with Sigma Macro 50mm f/2.8 compatibility
Posted By Just1MoreDave
Replies: 5
Views: 173
Those photos didn't come through for me. I think the lens is this one: Sigma 50mm F2.8 Macro Lens Reviews - Sigma Lenses - Pentax Lens Review Database - which should have an A position on the aperture ring. It does have a Ricoh pin but it's rounded and has never gotten stuck on my three cameras. When you mount the lens and turn on the camera, it should ask you for the focal length, that's normal. If the aperture ring is set to A you should see the aperture setting on the display and viewfinder.
Forum: Troubleshooting and Beginner Help 2 Days Ago  
second body for m42 work
Posted By Just1MoreDave
Replies: 11
Views: 568
I always stopped at ISO 1600. At 3200, I could get rid of the noise*, but there was a serious decline in dynamic range. The images looked very high contrast and less real. You can see this for yourself by taking the same shot with the K-7 and K-3 at 3200 or 6400. With faster lenses, 1600 is OK inside, depending on your artificial light.

*I use Lightroom 4 and shoot in RAW. I don't know what settings would work for the camera's JPEG processing.
Forum: Troubleshooting and Beginner Help 3 Days Ago  
What are the best settings for speed in continuous shooting K-5.
Posted By Just1MoreDave
Replies: 5
Views: 315
The card should be fast but that's in 5 years ago terms. Probably something labeled class 10 is fine. Press the Info button until you get a screen with the time and date at the bottom. That has lots of the settings you need. You can turn everything in the middle 8 boxes off, Highlight Correction to HDR. JPEG will be faster because the camera should be able to write the files to the card faster. I think the K5 is supposed to be able to continuously shoot JPEGs in high speed until the card is full. You can switch to manual focus so the camera doesn't have to think about AF. That's about it.
Forum: Troubleshooting and Beginner Help 5 Days Ago  
I just got a new s/h K-5II body.
Posted By Just1MoreDave
Replies: 20
Views: 832
The *ist D is the only Pentax DSLR to take CF cards, but apparently you need a firmware update to use a card bigger than 4Gb. The update makes the camera work better with non-A lenses also.
Forum: Troubleshooting and Beginner Help 5 Days Ago  
Question on using the Tamron AF (IF) 79D/179D 28-105mm F4-5.6 with my Pentax K-30?
Posted By Just1MoreDave
Replies: 19
Views: 431
I went on a little 28-105 spree once, with about 5 lenses in that range, not including the Tamron. The focal range is good for something like a big family event. You can take people shots that don't look too weird within that range, without getting in anyone's face. Sure, you can't get a lot of blurred background shots but that kind of event is more about unposed shots with more depth of field. It's within the range of a camera mounted flash, though the combination gets heavy and bulky. I kept one lens (Pentax FA 28-105 f4-5.6 Power Zoom) just for that kind of thing. Unless you are getting paid for events, you don't need awesome quality, just pretty good. If you take your camera to a lot of family events or parties, it's worth the $50. The 18-135 can probably do all the same shots, so when you get that lens, the 28-105 will sit in a drawer. That's the only reason not to buy it.
Forum: Troubleshooting and Beginner Help 6 Days Ago  
I just got a new s/h K-5II body.
Posted By Just1MoreDave
Replies: 20
Views: 832
The auto ISO is tempting because you can limit its range in the setup menu somewhere. Something like 3200 is pretty good. But auto anything depends on the meter. The 77 segment metering is a lot better than the 16 segment metering on the *ist D or K10D but not 100% reliable.
Forum: Troubleshooting and Beginner Help 12-10-2017, 07:16 PM  
Pentax K-70 - What are the recommended settings I should make out of the box, if any?
Posted By Just1MoreDave
Replies: 20
Views: 897
It is a good idea to take notes on settings you change from the camera default settings. You probably won't remember them all later, and if you have to reset the settings for some reason, it's easier to refer to notes.
Forum: Pentax SLR Lens Discussion 12-10-2017, 10:23 AM  
Tamron 90mm f2.5 sp 52E P ?
Posted By Just1MoreDave
Replies: 8
Views: 5,504
I have a light tent setup with backgrounds that I can change. If I have a white background, like a lens for sale photo, the spot shows up. It's obvious at f11 but if I take a bunch of shots at other apertures, it's still there at f8, just not immediately apparent. With a dark background, I didn't see a spot at f11. I didn't do extensive further testing to determine the exact limits, but once I noticed that background difference, I kept it in my mind for ordinary use, and hardly ever see the spot now.

Some ideas that I never pursued: a mask on the rear element like a Pentax K series telephoto, or a really deep hood.

I'm better at buying macro lenses than using them so I bought the Tamron 272. I still have both and mostly use the one within reach.
Forum: Pentax SLR Lens Discussion 12-09-2017, 05:32 PM  
Tamron 90mm f2.5 sp 52E P ?
Posted By Just1MoreDave
Replies: 8
Views: 5,504
The 52E is the autofocus version of the 52B or BB. For some reason each variation has a different filter size but optically the same design. It has a focus limiter. It's a pretty good lens.
Forum: Pentax SLR Lens Discussion 12-08-2017, 09:51 AM  
K-1 and extension tubes with P-TTL flash. Are deglassed converters the only option?
Posted By Just1MoreDave
Replies: 17
Views: 490
Probably. I think the 7th data pin carries the correct aperture information and focal length too. But I haven't done it, so proceed at your own risk.
Forum: Pentax SLR Lens Discussion 12-07-2017, 08:53 PM  
K-1 and extension tubes with P-TTL flash. Are deglassed converters the only option?
Posted By Just1MoreDave
Replies: 17
Views: 490
There isn't a code for the six contact system that represents f1.8. The contact pattern only does half-stops.
Forum: Troubleshooting and Beginner Help 12-05-2017, 09:16 PM  
Any suggestions for new bounce flash for Pentax K-30 that are on the affordable end?
Posted By Just1MoreDave
Replies: 6
Views: 374
The AF280T has its own sensor. The camera says "fire", the flash fires, the sensor sees a certain amount of light in the scene and cuts off the flash. The simple technology works pretty good within limits. The sensor doesn't know the lens focal length you're using, and it can't adjust to very wide or very telephoto focal lengths. And flash power isn't unlimited.

The other automated option is P-TTL. The flash fires a short burst, measures that, then calculates exactly the most perfect amount of flash power to use for the main flash burst. It shouldn't matter whether you are bouncing the flash. You can run out of flash power but the flashes are often bigger with zoom heads that match the flash to focal length. This works just like all other automated technology that makes our lives more wonderful. In other words, sometimes. It's kind of expensive tech to only work sometimes.

Manual flash sounds like a lot more work but ultimately, fires the same flash tube as the expensive flash. The camera's meter can give you information about the existing light. You set the flash power to add to it. In M mode, pick an aperture and ISO, then set the shutter speed for reasonable hand holding. Then point the camera at a scene. The meter will show you a bar that tells you how far off your settings are from working. The flash power reads in fractions of full power. Each fraction is half or twice of the next setting, so it works like ISO or full stops on aperture or shutter speed. A few guesses and you can figure out the right power for that scene. When that starts to work, adjust the look of shots by changing other settings.
Forum: Pentax SLR Lens Discussion 12-02-2017, 09:58 PM  
Best diffraction spikes in a lens?
Posted By Just1MoreDave
Replies: 25
Views: 741
Longer lenses make the point of the light source bigger, so the diffraction spikes don't have a nice center point. For a longer lens, the M50/4 macro is not bad, but only with a handful of subjects.
Forum: Troubleshooting and Beginner Help 12-01-2017, 09:09 AM  
What is the best Macro lens for my Pentax k-30
Posted By Just1MoreDave
Replies: 25
Views: 811
The 1:2 macros are cheaper and easier for casual use. The extra magnification of 1:1 is nice but more challenging for framing, focusing, light, etc. If you want to put the effort into it and your subjects are right for 1:1, you can get better shots. I will often take a shot at lesser magnification that works, simply because it was technically easier, when the high magnification shot failed to get everything right.
Forum: Troubleshooting and Beginner Help 11-29-2017, 10:17 AM  
Legacy 28 mm prime or current zoom
Posted By Just1MoreDave
Replies: 16
Views: 734
I don't think you need an f2 lens, if you are OK at handholding and OK with raising ISO. I have the Pentax-F 28/2.8 and take a lot of night shots around 1/15, f4, ISO 1600. I can still adjust from there, even 1/8, f2.8, 3200, before things get harder. These settings are for pretty low light, and it's unusual for me to need another stop (f2.8 to f2) beyond that. An f2.8 lens will be a lot cheaper and smaller.

All the Pentax 28mm lenses should be very good, so just buy those on cost, condition and features. Sorting out the third-party lenses is the harder part. In general, older third-party lenses have worse coatings than any of the Pentaxes, and coatings are where the colors and contrast come from. The Sigma 28/2.8 should be a good test for you. Don't buy or shop for anything else yet. Get the Sigma and use it a lot, under many conditions. Either you like it or it should point you to what you need in your next lens.
Forum: Troubleshooting and Beginner Help 11-24-2017, 10:31 PM  
Why only some screw type lens will work on adapter
Posted By Just1MoreDave
Replies: 19
Views: 778
I'm going to guess the lenses for fun, in order of the photos:

Takumar 55mm, maybe Super-Takumar, because these are really short.
Soligor 28mm 2.8 (not really hard to guess 28/2.8) because of the focus ring diamonds
Takumar 100mm f4 Macro - because it looks too long to be the 50/4 macro
Soligor 24mm f2.8 - distance scale seems spread out more, could be another 28
SMC Takumar 50/1.4 - could be a 55 too
Forum: Pentax SLR Lens Discussion 11-24-2017, 07:24 PM  
Poll: Which manual 50 to take for a city trip?
Posted By Just1MoreDave
Replies: 8
Views: 487
Either K will have the same size cap as your 28. Or, if you like, the same coatings - the M series is a little different. I chose the 55/1.8 in the poll but go with the one you like.
Forum: General Talk 11-24-2017, 06:32 PM  
Boeing airliners - have you collected the set?
Posted By Just1MoreDave
Replies: 29
Views: 898
I believe John Travolta went to a lot of trouble to get a 707, then realized he could get a 747 with only a little more work. For a while he had both, but you know how it is, you're always taking the 747 because it's newer, the old 707 always has some kind of maintenance thing going on, the wife doesn't like driving it herself, etc. So he gets by with one these days.

The DC-9 is related to the 717 - the 717 is a design started as a successor to a DC-9.
Forum: Troubleshooting and Beginner Help 11-23-2017, 03:40 PM  
Lens and Low Light Focusing Advice
Posted By Just1MoreDave
Replies: 10
Views: 482
The DA* 55/1.4 is really good at showing me the transition between in focus or out of focus. But it is really slow at locking AF. For your purposes, the people would be gone by the time it locked.
Forum: Pentax SLR Lens Discussion 11-21-2017, 09:32 PM  
No cheap chinese flanged M42 adapters?
Posted By Just1MoreDave
Replies: 12
Views: 469
You could make one with a regular adapter, by gluing a washer to the part that fits into the mount. Some thick plastic, epoxy and a knife would work. Some sheet brass, solder and files would make something very much like the Kipon.
Forum: General Talk 11-21-2017, 07:37 PM  
Boeing airliners - have you collected the set?
Posted By Just1MoreDave
Replies: 29
Views: 898
Aloha was still flying 737-200s in regular scheduled passenger service, like 8 times a day, until they went bankrupt in 2008. I know I've been on a -200. There are only 30 -100s so maybe I missed those. The problem is that until recently, 737s were so forgettable. I started to notice the -700s because of the winglets, and the -800s because of the interiors. There are almost 10,000 of them altogether.
Forum: Troubleshooting and Beginner Help 11-21-2017, 04:22 PM  
Help with buying a lens for GF for Christmas
Posted By Just1MoreDave
Replies: 42
Views: 1,277
My 16-45 is pretty reliable. I got it used in June 2009 and it accounts for about 10% of my shots. I'd use it more if it was weather resistant. Anyway, I promised car interior shots but this is the only one I could find. The car is a 2017 Mercedes-Benz S550 from the back seat. The night shot I posted previously at 23mm was also taken with the 16-45.

IMGB6628 by just1moredave, on Flickr

That black ash trim doesn't work for me. I'd get walnut burl.
Forum: Troubleshooting and Beginner Help 11-20-2017, 09:29 AM  
Help with buying a lens for GF for Christmas
Posted By Just1MoreDave
Replies: 42
Views: 1,277
You might look for a Pentax DA 16-45mm f4. This lens was discontinued a few years ago so you can't find it new, and it has sort of fallen out of favor because Pentax released other lenses that do more stuff. I've seen great prices on used ones, and it should be well within your budget. It's the cheapest way to get as wide as 16mm. I must have some car show photos with it.
Forum: Troubleshooting and Beginner Help 11-19-2017, 01:26 PM  
Help with buying a lens for GF for Christmas
Posted By Just1MoreDave
Replies: 42
Views: 1,277
A couple of examples of "inside a car" shots might help. The car is a small convertible. The first shot is at 23mm, close enough to the DA 21mm f3.2 lens. I think for a shot of someone in the car, you need something between 15 and 24mm.

IMGB5262 by just1moredave, on Flickr

This shot is with the widest (or almost) field of view you can get for the K3, same car. The lens is the DA 10-17mm fisheye zoom, which uses barrel distortion to get this exceptionally wide field of view. The distortion makes people look weird so it probably isn't the lens you want, it's just an example of the most you can expect to cram into one shot.

IMGB4084 by just1moredave, on Flickr
Forum: Troubleshooting and Beginner Help 11-17-2017, 10:03 PM  
K100D not reading memory cards anymore
Posted By Just1MoreDave
Replies: 20
Views: 637
No, but how hard could it be? :) I sometimes sweat a little in the middle, wondering if it's all going to go together right, but usually pull through. I'd rather do camera repair than plumbing.
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