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Forum: General Talk 3 Days Ago  
On-line purchasing and Deliveries
Posted By Just1MoreDave
Replies: 11
Views: 268
The US jobs situation is really weird. We have the same inflation as other similar economies, higher energy prices, supply chain issues, outrageous housing costs, lots of talking heads to tell you how bad it is. Then we get monthly reports on jobs and they look like everything is pretty good. Unemployment is low and wages are up. The talking heads try very hard to explain this with their favorite theories, all wrong so far. But the result is, people can find a nice job if they look hard enough. A lot of nice jobs today are working from home with no commute or weather issues, the opposite of mail delivery. I saw two signs yesterday while out offering signing bonuses. One was for our local transit system, a $4000 bonus! Like I said, really weird.
Forum: Troubleshooting and Beginner Help 3 Days Ago  
PENTAX-A 50mm/F1.2; "the GRENADE". HELP & ADVICE NEEDED ! ! ! thanks :)
Posted By Just1MoreDave
Replies: 50
Views: 1,525
I got a used DA*55/1.4 instead of an A50/1.2. I've never tried the A50/1.2 so I just convinced myself that the DA* was a great choice. If you want shallow depth of field, they are the same. You can't brag about having an f1.2 lens. The DA* has all the cool modern features. It is an all weather lens. It used to be a big lens but the new 50mm lens makes it look small. I am very happy with the images. You should look at some samples first; it does have some fringing under certain conditions. The autofocus is normally slower than other new lenses, so it's maybe not awesome for street shooting.
Forum: General Talk 4 Days Ago  
On-line purchasing and Deliveries
Posted By Just1MoreDave
Replies: 11
Views: 268
Ha! I was wondering something very similar - whether I have just lived long enough to remember when institutions were more reliable, or whether they indeed have declined. Of course I remember before online convenience was a thing as well.

Our local post office says they are 30% short on staff, so for the last few months they just don't deliver on some days. I don't think that will get fixed soon.
Forum: Pentax SLR Lens Discussion 11-27-2022, 07:49 PM  
Need a 24mm prime lens. Any recommendations?
Posted By Just1MoreDave
Replies: 26
Views: 965
I did use mine for several shots on my last roll. I am pretty sure that was in 2009, not a big film user :). I remember being impressed with the wideness.
Forum: Pentax SLR Lens Discussion 11-27-2022, 01:24 PM  
Need a 24mm prime lens. Any recommendations?
Posted By Just1MoreDave
Replies: 26
Views: 965
The Kiron 24mm f2 is very good for a fast lens. It's prone to an oily aperture but that's the only down side. Kiron made lenses for Vivitar and some other brands. The Vivitar serial numbers start with 22 if Kiron made it. My copy is sharper than my Sigma Superwide II but just barely.

The Sigma 24mm f2.8 that everyone likes has about three versions with the same optical formula. They all use the name Superwide. For an ME, you can get the first Superwide version, which doesn't have an A on the aperture ring. The previous lens was called Filtermatic and does not have great reviews. It's also bigger.

Vivitar used several manufacturers. Cosina made a 24mm f2.8 for them (can't remember the serial number code - maybe 09?) that was pretty good. I did have a Vivitar RL 24mm f2.0 made by Komine. Ordinarily Komine lenses are good, but that particular lens was terrible. I have read one other report that matched my experience, so I'd avoid that one.
Forum: Pentax K-3 III 11-26-2022, 03:24 PM  
I think I am giving up, and am leaving Pentax, unless there is an effective solution
Posted By Just1MoreDave
Replies: 68
Views: 3,226
I got a puppy a couple of months ago, and set up the camera to do all the autofocus thinking - no zones or selecting or anything. Nearly all my dog shots are with the DA 18-135, and I've never did any fine focus adjustment on any lens. The only thing I do is make sure the group of AF points are actually on the subject. For me, this totally works. The puppy isn't exactly still, and he's 14 lbs so the target is smaller than a person.

This is the not very helpful kind of reply, but I post it to suggest that the camera should be working better than it is. If it didn't work this well for me, I would just have switched back to manual focus or selecting just the center point, like my older cameras.
Forum: Pentax DSLR Discussion 11-24-2022, 04:18 PM  
Using aperture ring on DSLR: why not same as on Super Program?
Posted By Just1MoreDave
Replies: 30
Views: 1,004
The meter might be changing modes on you. If you have selected matrix metering, once you move the lens aperture ring off A, the camera sneaks into center-weighted.
Forum: Pentax DSLR Discussion 11-23-2022, 12:01 PM  
Please help me kick these ideas around in my head.
Posted By Just1MoreDave
Replies: 52
Views: 1,561
I think you'd be happier with the K-1 body size than the K-3 III, and DSLR over mirrorless in general. The tech details can drive you crazy, especially AF because AF is so dependent on how you use it. See if you can try the feel of the cameras first. I think the tech is close enough that the feel could be the deciding factor.
Forum: General Talk 11-21-2022, 04:59 PM  
Restoring an art piece
Posted By Just1MoreDave
Replies: 2
Views: 253
Green gold is an alloy of gold and silver, which is supposed to have a greenish tint.
Forum: Pentax SLR Lens Discussion 11-17-2022, 09:33 PM  
Pentax Super Program "A" lens questions
Posted By Just1MoreDave
Replies: 11
Views: 427
I wish I had a variable aperture lens to test, because it's an interesting question. If the Super-A came out well after variable aperture lenses, they should mention issues in the manual.
Forum: Pentax SLR Lens Discussion 11-17-2022, 12:40 PM  
Pentax Super Program "A" lens questions
Posted By Just1MoreDave
Replies: 11
Views: 427
I think the Auto ProRokinon 28-80 lens might have one issue. It has a variable aperture, which means at 28mm it opens to f3.5 and at 80mm it only opens to f4.9. I think when the Super-A was built, Pentax had no variable aperture lenses. I can't tell for sure but the camera might not know that the aperture changes as you zoom. If I'm right, in automatic modes the camera will underexpose images by about 1.5 stops at 80mm. I think it'll work OK in manual mode. You can see what aperture the camera displays at 80mm. If it says f3.5, use exposure compensation.
Forum: General Photography 11-14-2022, 11:38 AM  
Artemis I - Night Launch Settings?
Posted By Just1MoreDave
Replies: 13
Views: 630
I like to use the "extra" cameras for events like this, to experiment with different ideas. The PDF in post #2 suggests settings that would be OK even on older DSLRs. Try a long exposure, low ISO and wide angle on the oldest camera, while keeping the best lens and settings for the best model.

I have a mountain that's 55 miles away from my house and I can tell you from practice that focus is just a bit less than the infinity setting. The moon should be up so you can prefocus on that in magnified live view, but possibly crack the focus ring just a hair off of that.
Forum: Troubleshooting and Beginner Help 11-12-2022, 02:04 PM  
AF on an approaching subject
Posted By Just1MoreDave
Replies: 13
Views: 894
The FA50 and DA 55-300 don't have very fast autofocus mechanisms. The 16-85 is the most likely to succeed here.
Forum: Troubleshooting and Beginner Help 11-11-2022, 10:27 PM  
Budget auto focus 50mm and 28mm crop sensor lenses
Posted By Just1MoreDave
Replies: 20
Views: 784
I have the Pentax-F 28mm f2.8 and it is really good for me. For some reason the F version often goes for a higher price than the FA, even though the optical formula for the F is the same as the A or later M versions, where it wasn't as well-liked. The FA version does look different but I wouldn't call it worse. For people, maybe the Pentax-DA 21mm f3.2 works sometimes but I think is generally too wide or I am not good enough. The SMC version is cheaper.
Forum: Pentax K-3 III 11-07-2022, 09:42 AM  
Lunar eclipse composite?
Posted By Just1MoreDave
Replies: 4
Views: 512
I wonder if the K-3 III can take one of those lunar eclipse composites all by itself. I have fifteen hours to read the manual. It would require metering, interval and composite all working together.
Forum: General Talk 11-01-2022, 01:16 PM  
Your vehicle: what do you have, why do you like it, and what do you not like?
Posted By Just1MoreDave
Replies: 2,805
Views: 192,113
Payback is always subject to what future prices will be, and that has never been more difficult. Natural gas has been pretty cheap here since fracking. Then in February 2021, it snowed in Texas. Their electrical grid crashed, which caused a demand spike in gas and difficulties moving it around. Even in places that were nowhere near Texas, prices increased by a factor of 10 in a week; within Texas, much more. The prices fell pretty quick but this did affect my gas bill a lot for two months. Then everything was OK until Ukraine, which is even more unrelated to my gas supply here but I can't escape the global prices. The electricity here has also gone up 5 times in 4 years, partly energy costs and partly mismanagement.

With solar on my house and switching to all-electric stuff, I trade the less stable cost and maybe supply to something under my direct control. At this point with the infrastructure installed and paid for, adding more electric stuff pays it off faster, especially stuff I can use intermittently. Like I can wait for more sun before charging the car.

Also heat pumps are almost magical. We talked to a guy last month who installed a heat pump water heater. It has to extract the heat from some air source, essentially air-conditioning that source space. He was air-conditioning a crawl space which dropped its temperature 30 degrees F. The process is supposed to be 4 times more efficient than burning natural gas.
Forum: General Photography 11-01-2022, 10:02 AM  
Disturbing: Photographer detained for taking pictures on a plane
Posted By Just1MoreDave
Replies: 36
Views: 1,851
That's an interesting legal point. On the plane, flight attendants have broad authority and passengers don't. But that has to end somewhere - is it the jetbridge or the terminal? Because they asked/forced this guy back on the plane, I think they wanted the broad authority of the plane. The airport is probably full of changing jurisdictions and authorities.

If I'm getting off an Airbus 321 from Seattle to Charlotte, a 5 hour flight, I am certainly not thinking about legal boundaries of authority or photography. I'm thinking about putting that aluminum tube behind me as fast as I can walk, and looking for a restroom sign.
Forum: General Talk 10-30-2022, 02:52 PM  
Your vehicle: what do you have, why do you like it, and what do you not like?
Posted By Just1MoreDave
Replies: 2,805
Views: 192,113
We are going to look at replacing gas heat, gas water heater and conventional AC with heat pumps. I think the water heater swap is straightforward and the HVAC swap is not a big deal, but I'm not sure how much these systems will consume yet. It would allow us to disconnect gas service. Our system is grid-tied and we'd keep that. I want to finish the solar project and get some data before starting that project, but the gas furnace and water heater are 16 years old and going to die at some point anyway.
Forum: Pentax DSLR Discussion 10-30-2022, 12:48 PM  
change file naming prefix: is it possible at all?
Posted By Just1MoreDave
Replies: 10
Views: 3,004
Pentax adheres to a standard for file names which insists on the IMG part of the name. So even the cameras that allow you to modify the file name will keep using IMG. My creaky old Lightroom 4.4 can rename files on import, or use the metadata to select files based on the camera used, then rename them.
Forum: General Talk 10-30-2022, 09:33 AM  
How many moved or plan to move to battery from gas/ac power equipment?
Posted By Just1MoreDave
Replies: 22
Views: 605
I got a Ryobi 40V lawnmower in 2013 and it still works fine. My Home Depot had some other Ryobi 40V tools with water-damaged boxes a couple of years ago, so I got a hedge trimmer, weed whacker and a leaf blower for less than the cost of the batteries. I was never good at small gas engine maintenance or repair, so electric works for me. The only negative is the weed whacker is a little heavy. The leaf blower is very quiet. In the colder months, we'll get dry fluffy snow that I can just blow away. I have avoided chainsaws so far. I hate the engine noise enough so that I wouldn't have any gas-powered thing if there wasn't an electric alternative. The emissions benefits give me warm fuzzies but they are just nice to have.
Forum: General Talk 10-29-2022, 10:43 AM  
Your vehicle: what do you have, why do you like it, and what do you not like?
Posted By Just1MoreDave
Replies: 2,805
Views: 192,113
If my stupid electric provider would switch my meter like they promised to do, my solar array should generate enough excess power to charge a car and run the house. In the US, that ranges from totally practical (California) to not working that well (Maine).



Lots of people are working on it but it'll take a while. The technology needs to be a better battery but ideally, smaller, lighter, cheaper and last longer. The next step is a solid state battery, which exists in smaller sizes now. All they have to do is make it bigger and easier to make. One company doing that says they have figured out manufacturing and will deliver batteries to Ford and BMW by the end of 2022. They predict the battery could be in a production car by 2024 if everything works. That technology can improve on current batteries in most ways but it won't matter if it costs double, and costs aren't public yet. Most of the ideas involve manufacturing or packaging, not the battery itself. You can see why by looking at the Rivian battery. It has 7776 individual cells, all wired together, lots of supporting parts too. If Rivian could cut the parts count just in half, they'd save a lot.
Forum: General Talk 10-27-2022, 10:35 PM  
Your vehicle: what do you have, why do you like it, and what do you not like?
Posted By Just1MoreDave
Replies: 2,805
Views: 192,113
Thanks for the informed view on electric semis.

As much as I want one, an electric car makes no sense for me because I don't drive enough. Around town, I'll drive maybe 5000 miles a year. Even with more use, terrible gas mileage and high gas prices, I might spend up to $1500/year on gas. I can charge it for free at home, but a $10,000 car would have to last almost 7 years before I break even. The $10,000 used EVs around here are already old, like 8 to 10 years old. I won't live long enough to break even on a new electric truck at today's prices. It would be great to not buy gas ever again, though.
Forum: Troubleshooting and Beginner Help 10-27-2022, 10:01 AM  
Second hand lenses
Posted By Just1MoreDave
Replies: 11
Views: 804
Shine an LED flashlight through one of your own lenses to see how much dust they have.

You really want good pictures of used lenses. Good pictures show the front element with a nice reflection on it (the rear element too if possible), photos through the lens, photos of the aperture blades (both sides), the mount, and the full exterior. It is only slightly difficult to take these pictures. For example, a K-mount is shiny and will reflect a flash right back at you. I am suspicious of anyone who is so experienced a photographer to declare "no impact on image quality" but posts one or two shots of a lens that show no detail at all. I like to work at it to show off as much detail as I can:

IMGC8898 by Dave, on Flickr

Dust doesn't bother me too much. I don't want scratches. Image quality is probably OK but resale is very tough. I never see scratched lenses offered at a steep enough discount to take on the risk of less image quality and resale difficulty. Fungus depends on how I feel about taking that lens apart to clean it. It's extremely dry here so I can be pretty slack about fungus. I will buy lenses with battered exteriors (especially well-built lenses like Takumars) but lots of people won't.
Forum: General Talk 10-19-2022, 08:11 PM  
Your vehicle: what do you have, why do you like it, and what do you not like?
Posted By Just1MoreDave
Replies: 2,805
Views: 192,113
This video is a pretty good rundown of whether/how the Tesla semi will work. Some considerations were skipped or not thoroughly examined. Tesla restated today that they'll have some in December. When that happens they'll fill in some real numbers.
















You Tube



Forum: Pentax SLR Lens Discussion 10-17-2022, 11:28 AM  
Working with a single lens
Posted By Just1MoreDave
Replies: 41
Views: 2,608
I like to do this even with lenses that wouldn't be anyone's first choice, like a longer slow telephoto. If the lens is not too heavy and I have patience, I'll find something. The next outing usually gets better. Even terrible shots have a lesson, then can get deleted.

If I have time I follow along when others use a difficult lens in the Single-In Challenge, to borrow ideas.
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