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Forum: Pentax SLR Lens Discussion 07-18-2020, 11:24 AM  
DA 18-135 WR, Show us what it can do
Posted By JimJohnson
Replies: 3,368
Views: 547,908
Tough to tell in the supplied shot due to natural light fall off - but what it does say at a minimum is a user can go full-frame at 18mm so long as you are careful about the composition.
Forum: Pentax SLR Lens Discussion 07-18-2020, 08:13 AM  
DA 18-135 WR, Show us what it can do
Posted By JimJohnson
Replies: 3,368
Views: 547,908
At approximately what focal length does vignette become noticeable when this lens is mounted on the K-1 - or are you using the K-1's 3/4 crop function to avoid it?
Forum: Pentax K-3 02-08-2020, 07:51 AM  
Burning Mountain
Posted By JimJohnson
Replies: 9
Views: 1,234
Yeah, a lot more than one. Check out Teddy Roosevelt National Park in North Dakota. The region burned for thousands of years. There were coal vein fires when we passed though a couple decades ago. As mentioned, coal and methane is a wicked combination. Add a little oxygen and a tiny bit of heat and you reach flame point. Lightning does most of the ignition, but so can spontaneous combustion from inside a decaying pile of plant material.
Forum: Pentax K-3 01-31-2020, 08:44 AM  
why I won't buy a k3 (Warning: Satire Thread)
Posted By JimJohnson
Replies: 79,963
Views: 3,106,911
Finally a useful feature on a new car...
Forum: Pentax Camera and Field Accessories 01-09-2020, 08:23 AM  
UV filters degrade image quality
Posted By JimJohnson
Replies: 76
Views: 7,483
With the growing interest in 'wet' photography (film) the interest in filters will grow proportionally. As I slowly move back into film, my filters are coming out of storage. The purpose of a filter is to modify light. Lens protection became a secondary thing. If lens protection was ever a primary thing, we would see products labeled as 'protective glass' rather than 'filters'. UV filters are designed to sharply reduce high-frequency light. Digital sensors typically already have one. They are unnecessary on the lens. Film rarely has a UV layer applied, so such filters became popular. However, unless you are in a high UV environment like a beach on a cloudless day or at higher altitudes, a UV filter isn't going to do much for you with film either. And as well documented, an extra optical surface can increase flare and decrease contrast.

As for lens front element protection... Properly sized rigid hoods will substantially reduce the risk of impact damage - and reduce flare. As for dust and spray protection, this is one of the biggest reasons lens manufacturers have continued working on harder coatings. Learn good lens care techniques.

None of this is to say that a sacrificial UV filter might not be a bad idea from time to time in higher risk locales. The key word here is 'sacrificial'. If you spend big money on good filters, are you willing to sacrifice them? And cheaper filters will degrade image quality. As the saying goes "There Ain't No Such Thing as a Free Lunch". Each user has to determine his or her risk tolerance.
Forum: Pentax SLR Lens Discussion 11-17-2019, 05:18 PM  
DA 18-135 WR, Show us what it can do
Posted By JimJohnson
Replies: 3,368
Views: 547,908
Maybe we were. Did you almost run me over when I was shooting alongside the road, or did I almost run you over? :lol::lol:
A thumbs up for Harry's On The Loop. It is the greatest little dive bar to pull over for a cold one. Most of the parking area is covered a few layers deep with flattened bottle caps as opposed to gravel. The bouncer is a big yellow lab. Smile and give him a nice pat and he'll let you enter the bar.

We winter near Johnson City and I agree last spring was spectacular all over.
Forum: Pentax Forums Giveaways 11-16-2019, 05:48 PM  
PentaxForums 100 Year Giveaway - November - General Raffle Entry Thread
Posted By JimJohnson
Replies: 400
Views: 11,139
My luck I'll win and it will toss all my income for the year into the higher tax bracket (yeah right). I'm in!
Forum: Pentax SLR Lens Discussion 11-16-2019, 06:06 AM  
DA 18-135 WR, Show us what it can do
Posted By JimJohnson
Replies: 3,368
Views: 547,908
Beautiful - where in Texas Hill Country?

Here is one from Willow Loop from last spring:
Forum: Pentax K-3 11-15-2019, 06:37 PM  
K3 - SR on a tripod
Posted By JimJohnson
Replies: 7
Views: 981
My Fx button on the side of the pentaprism is programmed to toggle SR. So lets see how the group responds to monopod use. To SR or not SR?
Forum: General Talk 11-15-2019, 02:24 PM  
Your latest acquisition
Posted By JimJohnson
Replies: 20,271
Views: 1,440,343
78 pounds? For a snowblower? Around here, I suspect the childrens' play version weighs more than that and must move more snow! :):):)

The local big box discounter stocks a bunch of 5HP units every fall. They are still there and highly discounted by February. I think the only people who buy such a dinky unit are those who recently moved to the area. Most people around here bite the bullet and pay for a 9HP and up snowthrower. I have only a little area to clear and mine is a 9.5HP commercial model. But then we typically get 225 to over 300 inches (6.4m to 7.6m+) of snowfall each winter

And after living here 30+ years, you now know why my location reads Lake Superior in the summer and Texas in the winter!
Forum: Pentax K-3 11-15-2019, 08:03 AM  
why I won't buy a k3 (Warning: Satire Thread)
Posted By JimJohnson
Replies: 79,963
Views: 3,106,911
There is HR and there is HR.

A young dairy farmer once told me there are basically two ways to run the dairy business. You can treat the cows well. They won't produce as much milk but they produce milk longer. Or you can drive the cows harder. They produce more milk but won't produce as long before you have to replace them. Replacing cows is expensive and your production is not as regular. In the end, you make about the same amount of money.

Okay, My first career was HR. I worked from trenches to the corporate suite before I left the field. It may sound crude but you can substitute employee for cow in the above story and it is still in my mind true.

In my opinion I wasn't as 'successful' in the HR field as I could have been, because I was frequently battling one of the above mind sets. And as the pressure for short term revenues grew, management increasingly shifted to the one I battled. I was spending too much time and money (and no mistake, HR is an expense category, not a revenue category) replacing employees and training new employees in organization basics.

I moved from HR into the financial services sector and spent the last 17 years before I retired in the high tech side of financial services. There are still requests for my talents as a consultant, but if I wanted to continue working full time, I would not have retired. I did take a part time gig this year as an employee of a consulting firm. From the start, I was critical of my employer's HR practices and offered instead of doing financial services consulting, to consult on certain of my employer's HR procedures. A couple weeks ago my employer fired me. My financial services client loved the work I was doing. I was fired because I was very vocal that one of my employer's HR practices was blatantly illegal.

The vice president who called me to tell me I was terminated immediately asked if I had any comment? I laughed at him and told him the company needed a new HR manager. It wasn't like I needed their money, and certainly didn't need the employer's aggravation. I could raise all kind of legal hell for this employer, but life is too short.

I then resumed eating my dinner with my wife. We had rouladen. For those unfamiliar, this is german entree made from thinly sliced steak rolled and cooked with bacon and onion (and/or pickle) inside. See I eventually got to the most important part of this post. :):):)
Forum: Pentax K-3 11-15-2019, 06:42 AM  
Suggestions for a camera case that'll fit the K3 + Sigma ART 18-35 + O-ME53 eyecup?
Posted By JimJohnson
Replies: 20
Views: 1,284
The biggest problem with a dSLR with a mounted lens and non-photo backpacks is the T shape makes for awkward packing. If the camera doesn't have to have your Sigma lens mounted when in your backpack, I would suggest a pair of inexpensive neoprene cases - one for lens, one for body. No awkward T shape for packing and my gear is protected inside my backpack.

When I fly, I collapse my domke style bag flat in my roller bag and put my gear into these neoprene bags for transport inside my laptop capable backpack. I reassemble my photo bag at my destination. I have yet to see a good photo backpack that leaves sufficient room for the laptop, accessories and enough general storage for a day of touring on my feet.

For my recent trip to Europe, I looked at that body cap on my K-3. I picked up a used DA 40 XS (pancake lens) and used it in place of a body cap. I had a great camera ready for photography that still fit inside its easily packed neoprene body case.
Forum: Pentax K-3 11-09-2019, 08:26 AM  
why I won't buy a k3 (Warning: Satire Thread)
Posted By JimJohnson
Replies: 79,963
Views: 3,106,911
I think it depends on the school. To my knowledge my high school graduating class has held two: 10 year and 33 1/3. Yeah some symbolism there. My wife's graduating class (we are the same age) has one at least every 5 years and it is fairly well attended. What is the difference? My mind, the organizing committees.

For my class, the organizers arranged formal dress, a live (loud) group, high-ticket affairs with over priced sit down meals, that are only moderately attended.

My wife's class picks a bar with a party room or patio, roughly $10 per person including soft drinks, simple snacks and skimpy decorations, cash bar and pot luck food offerings encouraged. My wife has a small class, but it is not unusual for 60% plus of the surviving members to attend - and a goodly number are no longer local. Maybe some background music, but nothing loud so the classmates and companions can actually hear themselves talk. With this frequency and attendance, we non-class members who come with our significant others don't feel like we are on the fringe. We also know plenty of people with which to mix and converse.

For the record- bacon wrapped water chestnuts make great reunion snacks.
Forum: Pentax K-3 11-09-2019, 07:25 AM  
Cool factor in 2019
Posted By JimJohnson
Replies: 22
Views: 1,546
I agree, and I don't. Condensation is a thing to worry about. With a weather sealed body and lens, you can wipe down the camera and not overly worry about the condensation from seeping into the equipment. For sure, you don't want to break that weather seal by, for example, changing a lens until the camera is stabilized outside and inside. With non-weather sealed gear, you do have to worry about condensation seeping inside the gear even if you did wipe things dry.

And yes, two bodies is always safest - especially if a lens change is required.
Forum: Pentax K-3 11-08-2019, 09:31 AM  
why I won't buy a k3 (Warning: Satire Thread)
Posted By JimJohnson
Replies: 79,963
Views: 3,106,911
I've flown enough on business trips to know that I need to check my options and be assertive. Don't just take what airline agents tell you initially. At the same time, don't be an ass. On my last business trip, on the way out I knew I would miss my connection and the delay would be more than two hours - I asked and got re-ticketed on a competitors flight. Gave up my nice seat and perks, but I got there. On the way home, the whole system was screwed up for all carriers. I rebooked three times that day and my wife drove five hours to pick me up. But I got to my destination THAT day. Because the issue was weather related, airlines won't pay for lodging. I saved spending a night at my expense. My second rule on business travel is if it is a critical item, don't check it. And if it is not critical, think very very hard about taking it period. That rule is how I was able to (somewhat) rebook as needed throughout that miserable day and get to my destination with all my stuff.
Forum: Pentax K-3 11-05-2019, 06:57 AM  
Cool factor in 2019
Posted By JimJohnson
Replies: 22
Views: 1,546
A cousin's spouse is a professional portrait photographer, and frequently does team shoots or alumni gatherings. Likewise, the talk is about images and technique. We do compare gear - not because one brand takes better pictures than another, but about features we would regularly use. She shoots Nikon for two reasons: It is what she trained on, and you can find service, parts, accessories when you need them NOW seemingly on every other street corner. What she admired most about my Pentax gear was weather resistance. Large group shots are often taken outside and small group or individual shots taken inside. She always has to worry about condensation when moving between environments. Would either of us switch brands for our primary gear? Unlikely, but we are not trying to 'sell' each other either.

I'm sure many of us have heard the joke... An acquaintance commented that with the gear he was using, he must take wonderful photographs. He was invited to dinner. It was quite good so he complemented his host on her excellent pots and pans.
Forum: Pentax K-3 11-04-2019, 07:00 AM  
Cool factor in 2019
Posted By JimJohnson
Replies: 22
Views: 1,546
In regards to gear envy.... My niece was married in 2017 and the couple hired a professional wedding photographer (with his assistant, of course). I'm not a wedding (nor portrait) photographer, but I can do some decent candids, so my goal when attending such events is to stay out of the pros' way and capture things they might miss and present them to the couple as snapshots rather than high-end photography. I brought my K3 & grip (which coincidentally I purchased used from a wedding photographer here on the Forum) and my 540 flash.

The K3 is a relatively quiet camera. During the ceremony I used a faster prime, bumped the ISO up, and shot non-flash from the church pew. The pro didn't see me. At the posed photo event following the ceremony, I mounted the flash and stayed off to the side. The only shots I took were during setup or shortly after the pro finished shooting his setup. Again, I was looking for candids, not portraits. And of course there were a couple dozen other people with their P&S, tablet or cellphone cameras trying to grab the same shot as the pro - everyone got a lecture about not shooting when the pro was doing his thing. The pro otherwise ignored them; but as soon as he looked at my gear, did I ever get a stink eye! What could he complain about? I never fired a shot when he was aiming his camera.

To avoid conflicts with this arrogant SOB I deliberately didn't take many shots at the reception - but multiple times my wife and I saw the pro's eye on me and my rig sitting on the table. I had everything I could do to keep from laughing at the guy one time. I like doing still life shots. I spotted the bride's shoes sitting nicely in front of the wedding party's table. Everyone was on the floor dancing and the pro was grabbing shots of that action. I squatted down and got a great shot of the shoes and the table. As I rose and walked back to our table my wife discreetly pointed back at the wedding party table. I turned and the pro had moved over to my spot and was studying what I had shot. He caught me looking at him and smirked when I shrugged my shoulder. At least I didn't make a more rude gesture.

For the record, most professional photographers quickly pick up on what I am doing and treat me just like the rest of the guests - maybe better because they see I am staying out of their way.
Forum: Pentax K-3 11-02-2019, 04:01 PM  
why I won't buy a k3 (Warning: Satire Thread)
Posted By JimJohnson
Replies: 79,963
Views: 3,106,911
Geeze, and I thought we were 'chewing the fat'. Maybe American idioms don't count? :lol:
Forum: Pentax K-3 11-02-2019, 08:37 AM  
why I won't buy a k3 (Warning: Satire Thread)
Posted By JimJohnson
Replies: 79,963
Views: 3,106,911
Yeah financial cards that may have a RFID chip will contain the account information. WHO is responsible for the account is generally not on the card. And why should it be? The provider of that card has it in their database. However, official identification for citizens and legal non-citizens DOES have WHO you are. And that data is NON-ENCRYPTED. Sure it is a nuisance, but I can close a financial account and open a new one. It is a bit harder to reboot ME should my identity be stolen.

Funny story - now - not so funny a few years ago... The US passport used to depend a lot on your name as to whether you got closer scrutiny coming back into the US. "James Johnson" - give me a break. How many people have that name? There had to be at least one seriously bad dude using my name. I was stopped literally every time I tried to reenter my country. Michigan borders Ontario, so like Mr. Racer, we routinely visit Canada. It got to the point that the border guards would apologize before asking me to head over to the additional inspection area. They didn't even bother with directions. My wife and I would leave our car and sit with some rather sketchy looking people waiting their turn for interrogation. I even had a personally signed letter from my US Senator on official Congressional letterhead on the subject. Made no difference. A decade ago we were returning home from Europe. The electronic kiosk refused to give me a boarding pass and directed me to the ticketing personnel. The gal took my passport, scanned it and suddenly her eyes got really big - she excused herself to go into the back room. I'm pretty sure she was calling the US State Department in the middle of the friggin night in Washington DC. She came back out and slided my passport and boarding pass across the counter, snatching her hand back so I couldn't possibly touch her - still with big eyes.

The problem disappeared when I renewed my passport - with its embedded RFID chip.
Forum: Pentax K-3 11-02-2019, 07:04 AM  
why I won't buy a k3 (Warning: Satire Thread)
Posted By JimJohnson
Replies: 79,963
Views: 3,106,911
The current US passport & passport card puts your personal information on an non-encrypted embedded RFID chip. I can't speak for other US States with enhanced driver's license, but if you have an enhanced Michigan DL, it is the same as having a US passport card - and has an non-encrypted embedded RFID chip. There is speculation that nefarious identity thieves can capture this data with portable RFID scanners. Standing in public airline ticketing areas or exits from baggage claim, car rental or hotel check-in desks are 'good' spots to capture this data. In short, use RFID shields with your official identification and minimize the time it sits outside these shields.

Something else I noticed ... I renew my Michigan DL typically every 4 years. I renew my passport every 10 years. The added renewal cost for an enhanced Michigan DL is about the same as the marginal cost of getting a passport card at the same time as I renew my full passport. The difference is having to provide that citizenship paperwork every 4 years versus every 10 years. Since I have a passport card, I no longer get the enhanced Michigan DL. I fly with my passport card instead. And I use my non-RFID chip Michigan DL when standing at places like car rental or hotel check-in desks.

We have a lot of non-US members in this Forum. Please accept my apologies for temporarily hi-jacking this thread for a topic that likely doesn't matter to you.
Forum: General Talk 10-31-2019, 06:32 AM  
Your latest acquisition
Posted By JimJohnson
Replies: 20,271
Views: 1,440,343
Seemingly the DA 40/2.8 has the same optics as the limited version. Without doing a side by side, I'm happy with the DA 40 I have. To solve the hood/cap dilemma I purchased an inexpensive step ring, filter ring mounted hood and pinch cap for the front of the hood suitable for the field of view. The combo is about the same length as most primes in this focal length with no or a reversed hood.

But hang on to the rubber plug front cap. When I fly I am restricted by the number of carry on bags, so no separate field camera bag. I have a field camera bag squashed flat in my roller bag with my clothes along with my more rugged photo accessories (without lithium batteries). A 'T' shaped (D)SLR with a mounted lens doesn't pack or travel well in a standard back pack. Instead I put my travel selection of lenses in neoprene lens cases and I put my camera body in a neoprene body case - with the DA 40 mounted using that otherwise near useless rubber plug. I reload my field camera bag at my destination, but meanwhile, I still have a useable camera during travel in my back pack without having to scrounge around for a lens.
Forum: Pentax Film SLR Discussion 10-30-2019, 06:46 PM  
Bellows II + Slide Copier
Posted By JimJohnson
Replies: 41
Views: 9,735
My caution with the dangling tripod / lightbox approach is to do this in a windowless room and drop room lights to an absolute minimum before exposure. Otherwise there will be some glare off the film that will impact contrast... you might not think there is, but there will be. What you are gaining using a bellows is a total block of such extraneous light. Also, make dang sure that the film is parallel to the camera's sensor or you will have parallax distortion. Something else you shouldn't need to worry about with a bellows.

Otherwise, you should be fine. Back in my wet lab days, I made quickie prints from slides using my enlarger and Kodak instant film packs. Expose, cram the film back into the camera and take a non-light exposure to force the film through the developing pressure rollers. Really, that is darn near the same concept as the tripod / lightbox approach.
Forum: Pentax K-3 10-06-2019, 12:22 PM  
Has anyone been able to disable SDM using the K-3?
Posted By JimJohnson
Replies: 28
Views: 4,132
You would have to insulate ALL the data pins to turn a lens into a K (M) mount. A number of the pins communicate the lens' aperture range to the body for the 'A' setting. I was suggesting insulating only the additional data pin that appeared with the KA2 mount along with the power contacts.

None the less, point taken. This topic has likely been beat to a dead horse elsewhere in the Forum.
Forum: Pentax K-3 10-06-2019, 10:48 AM  
Has anyone been able to disable SDM using the K-3?
Posted By JimJohnson
Replies: 28
Views: 4,132
It looks like the KA2 mount has one more data pin near the edge of the flange than the KA mount. I'm not surprised that power only doesn't do it. But bet insulating that extra pin would. On the other hand, it might turn the lens into a non-AF KA lens too.
Forum: Pentax K-3 10-06-2019, 05:03 AM  
Has anyone been able to disable SDM using the K-3?
Posted By JimJohnson
Replies: 28
Views: 4,132
Okay, got it. "When" not "If". And twigging the software is cheaper than repairing or replacing the lens. I'm sure somebody has an answer to this, but why not just dab a little insulating lacquer on the SDM contacts on the lens? I think this is the power and one of the data pins. With no power/data connection to the body, wouldn't the lens automatically use the screw drive? (become a KAF mount rather than a KAF2)
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