Forgot Password
Pentax Camera Forums Home
 

Showing results 1 to 25 of 300 Search:
Forum: General Photography 1 Day Ago  
Is it bad to store lenses and equipment in a pelican case long term?
Posted By Alex645
Replies: 13
Views: 621
Excellent thorough explanation by Norm. I can share one real world problem that happened to a student of mine (not a mold issue). But as Norm says, it is user error; not the fault of the Pelican case:

1992 (pre-Google): I'm teaching photography at the American College of Switzerland in Leysin (last cogwheel train station in the Alps). A student borrows camera equipment packed in a Pelican case for his trip to Paris on Friday. When he returns on Monday, he tells me he couldn't take any photos because the case wouldn't open. He even tried to pry it open with a screwdriver and failed.

I knew instantly what the problem was and asked the student to open the case. He said he'd tried all weekend, so why would it open now? Of course it opened with no effort.

I DID explain to him on Friday that because we were over 4000 feet above sea level, when he went down the mountain, he'd have to release the purge valve to allow the air pressure to equalize. Apparently he wasn't paying attention and didn't notice the valve as anything functional to his problem of the case not opening. :confused:
Forum: General Photography 2 Days Ago  
Is it bad to store lenses and equipment in a pelican case long term?
Posted By Alex645
Replies: 13
Views: 621
I use a Pelican case, but because it is air tight, you do have to be careful not to lock in any moisture. This is most problematic if you are putting away a very cold lens into a warm case due to condensation. The key with any air tight container is using a desiccant and then checking on the desiccant for signs if it needs to be "recharged".

I currently like and use The E-333 Renewable Mini Dehumidifier | Eva-Dry

Just plug it in when the beads are orange or pink (water saturated) and wait a few hour till they turn blue (dry and capable of absorbing moisture).

Another potential problem with air tight containers could be enclosing a lens with mold or fungus. That could spread to the others.

One solution that I know some folks have done is to put a safe in their garage. The garage isn't warm like the house and so less condensation when putting gear away. Also the hot car engine will dry the air. However anyone with a washer and dryer in their garage could have higher humidity issues.
Forum: Pentax DSLR Discussion 2 Days Ago  
Which Pentax camera to buy next?
Posted By Alex645
Replies: 25
Views: 923
Historical perspective?
1) EI-2000: First Pentax digital camera released in early 2000. 2MP!
2) EI-100: Classic compact and the smallest sensor at 1MP.
3) *ist D: First Pentax DSLR. 6MP.
4) 645D: First Pentax medium format. 40MP.
5) K1: First Pentax full frame. 36MP.

Practical perspective?
1) KP: Current top of the line APS-C, unique design, discounted prices due to upcoming K3iii. 24MP.
2) K1ii: Current top of the line FF. 36MP.
3) 645Z: Current top of the line MF. 51MP.
4) QS-1: The last Pentax named mirrorless ILC. 12MP.
5) WG-3 GPS: The last and best featured Pentax named waterproof. 16MP.

Of course parent company Ricoh has better mirrorless and waterproof options, but they incorrectly spelled PENTAX on the front of those cameras.:D
Forum: Pentax SLR Lens Discussion 5 Days Ago  
Lens upgrade for wildlife photography
Posted By Alex645
Replies: 61
Views: 2,149
How are you going to get a DA* 300mm + TC + 18-135mm for $1000? Or was the budget just wishful thinking?
Forum: Pentax SLR Lens Discussion 5 Days Ago  
Lens upgrade for wildlife photography
Posted By Alex645
Replies: 61
Views: 2,149
For $700 you can get a new KP which IMO gives you acceptable ISO up to 1600.

For just under $1000 (over with tax) you can get a Pentax SMCP-DA* 300mm f/4.

Normally I'd recommend the lens before the camera as an upgrade. But because of your budget, I believe the KP will deliver what you want more effectively than the best optic solution.
Forum: Film Processing, Scanning, and Darkroom 6 Days Ago  
Darkroom shelves...
Posted By Alex645
Replies: 7
Views: 695
You do what you gotta do. I've been there, but used PVC piping to construct a stackable shelf for my trays. Drips are inevitable, so you may want to just put down a tarp on the ground or pick up a carpet 'remnant' from a local carpet or big box hardware store (end rolls of runners or plastic turf).

My main concern I would have based on my experience is the airborne dust/lint from your clothes or from the carpet as you close the door.

What do you use for ventilation?
Forum: Troubleshooting and Beginner Help 02-28-2021, 08:58 PM  
Recently Recieved Pentax Cameras Looking for Info
Posted By Alex645
Replies: 20
Views: 1,068
a) Selling any "collection" as a whole will usually yield less as a group than if sold individually.

b) Selling individual pieces, however, will take more time and effort and you may end up not getting any buyers for certain lenses.

c) KEH.com buys and sells used cameras and lenses like yours. They are experts at the condition of your gear once they inspect it and know what needs to be cleaned, lubricated, adjusted or repaired, and the cost for them to do that. They then have a sense of the market value for them to prepare it for sale, and will offer to purchase it from you. Depending on the condition they determine it to be in, their price, at best, it will be anywhere from nothing to perhaps 33% of the final retail price.

For example, currently they have four Pentax ME Super for sale. One is in excellent condition for $80, one has an inoperative light meter for $43, and they have two "as is" that are inoperative and either they can't fix it or it's not worth it for them to fix it so it's sold for parts only at $10 and $5. I don't know what KEH will offer you your ME Super, but if it's also in "excellent condition", I'm guessing they'll offer you $25-$30.

The advantage for the seller is you can send everything to them and forget about it. But you will get the lowest return.
The advantage for the buyer is that they offer a 180-warranty that you won't get from eBay or other vendors.

d) Pentax Forums has our own marketplace. Many members have bought and sold on this site. However, if you're not familiar with cameras and lenses, you may be dealing with a lot of returns because buyers here usually know exactly what is less than what you may thought was working perfectly.

e) eBay or Craigslist or pawn stores.

Your best bet for estimating the value of your equipment will be researching on KEH.com, PentaxForums.com marketplace, eBay, or Amazon. However, the cosmetic and functioning condition of the equipment will determine if it's worth $100 or $1 or everything in-between.
Forum: Troubleshooting and Beginner Help 02-28-2021, 11:58 AM  
Recently Recieved Pentax Cameras Looking for Info
Posted By Alex645
Replies: 20
Views: 1,068
Agree with @tibbitts. However, I teach both digital and film photography. The level of enthusiasm and engagement I see with my film students (many who have also taken my digital course) is much higher.

The writing on the wall easily shows that film is not preferred by most, but for those that do, they love it even more.
Forum: Troubleshooting and Beginner Help 02-28-2021, 02:15 AM  
Recently Recieved Pentax Cameras Looking for Info
Posted By Alex645
Replies: 20
Views: 1,068
Although I can give you an opinion on theoretically what's best and what's not, ultimately the only answer that matters would require someone that knows photography who can tell you the condition of the equipment.

IF the cameras are in working condition, they are worth keeping if you are willing to invest the time to learn and the cost of film and processing. However, someone with experience needs to examine them to see if the light seals are good, the shutter works and is in within reasonable accuracy, if the light meter works, if the winding and rewind mechanism all work, etc.

Do the lenses focus smoothly? Does the aperture work at all f/stops? Does the zoom work smoothly? When shining a flash light through the back of the lens, is it relatively scratch, dust, and fungus free?

Usually nothing is in mint condition nor completely unrepairable. In general, the cost of repair will meet or exceed the cost of buying the equipment in working condition.
Forum: Digital Processing, Software, and Printing 02-25-2021, 12:10 PM  
Basic Raw editing
Posted By Alex645
Replies: 13
Views: 748
Why not share a RAW image and start a thread/challenge to how participants edit differently and how? I don't know if it's true, but I thought I had read that Ansel Adams would have a negative he'd share to his students and then they would all have a go at it in the darkroom, and had to document their steps.

Needless to say, I think Adams learned as much from the assignment as his students.
Forum: Pentax Film SLR Discussion 02-25-2021, 12:06 PM  
The coolest vintage accessory: Mechanical timer
Posted By Alex645
Replies: 48
Views: 3,047
Because the Pentax 645 didn't have a self timer mode, I use one of these mechanical widgets on the 645. If the 645 wasn't loud enough, the spring winding down on these is smile-worthy before the shot.
Forum: Pentax DSLR Discussion 02-25-2021, 01:19 AM  
Are we really THAT rare?
Posted By Alex645
Replies: 6,497
Views: 851,267
With some of these cameras approaching 50 years, I am always concerned for the teenagers bringing in their SLR's from the last century. But with the K1000, at worst it's only worn light seals or a battery cover oxidized closed. The crop of cameras in my current class are amazingly mint condition, with the exception of a Canon EOS 10s that has plastic just begging to age badly.

I do wish anyone would make a durable, affordable, manual focus, manual exposure, simple SLR (or TLR) again.
Forum: Digital Processing, Software, and Printing 02-24-2021, 02:58 PM  
Basic Raw editing
Posted By Alex645
Replies: 13
Views: 748
Not sure where to find this on the forum, but ultimately there are tutorials on YouTube and many app sites.

I use Photoshop which is going to be the most expensive and most powerful software to use, but Adobe has lots of tutorials:
Photoshop tutorials | Learn how to use Photoshop

Adobe Lightroom is less expensive and more intuitive to use for 90% of what you'll want for most of your RAW images:
Adobe Photoshop Lightroom - YouTube

No doubt other PF members can recommend less expensive RAW editors that they use and prefer.
Forum: Pentax DSLR Discussion 02-23-2021, 06:44 PM  
Are we really THAT rare?
Posted By Alex645
Replies: 6,497
Views: 851,267
Latest tally on my current B&W Film Photo class for high school students:

6 Canon, 3 Nikon, 3 Pentax (K1000, MX, Zx5N-QD). 25% Pentax; respectable.
Forum: Pentax Medium Format 02-22-2021, 03:03 PM  
Pentax 645 first-frame advance problem
Posted By Alex645
Replies: 3
Views: 276
This really sounds like a firmware glitch.

I would try to reset the CPU by removing the AA batteries and then removing the CR1220 lithium cell. If you have a volt or multimeter, test that it's at least 3 volts, and if not, buy a new one.

After replacing all the batteries, try another test. Hopefully this will reset the chip to do what it was programmed to do before some ones and zeroes got scrambled.
Forum: Pentax SLR Lens Discussion 02-16-2021, 04:06 PM  
What is the purpose of the 15mm limited?
Posted By Alex645
Replies: 210
Views: 10,298
Thank goodness digital photography is completely metric otherwise we'd be having this never ending equivalency discussion about 19/32" is more like a 7/8" on a 59/64" sensor. :D
Forum: Pentax SLR Lens Discussion 02-13-2021, 01:23 PM  
Full-frame vs. cropped lenses on APS-C camera
Posted By Alex645
Replies: 184
Views: 6,535
Agree with Norm that this is the bottom line. You can buy a house, a car, an audio system, a computer based on numbers and stats, but the math only goes so far as an assessment tool, and nothing shows you "it is what it is" like experience with real world subjects, lighting, and then viewing the results on your media of preference.

We humans are (thankfully) always asking why? It's the left brain. Instead, IMO let the right brain start the dance and then you can let the left brain analyze the results.
Forum: Pentax SLR Lens Discussion 02-12-2021, 07:38 PM  
Full-frame vs. cropped lenses on APS-C camera
Posted By Alex645
Replies: 184
Views: 6,535
The only downside of using an FF lens with an APS-C sensor is size and cost. And as others have said, the resulting image would be equal or better than a lens designed for APS-C because of the crop of the edges and corners.

The SMC-FA 35mm f/2 at, for example f/2.8, will have better overall IQ than a SMC DA 35mm f/2.4 at f.2.8 or any equivalent aperture.

I say all this not just from theory but from real-life experience. The flaw in the original logic was that a measured lens resolution is affected by the size of the sensor. It's a good question and questions like this are what a good forum can unfold.
Forum: Monthly Photo Contests 02-09-2021, 01:41 AM  
Best of 2020
Posted By Alex645
Replies: 39
Views: 278
I would like to nominate this photo
Forum: Pentax Medium Format 02-06-2021, 12:29 PM  
645D: better at 200 or 100 ISO?
Posted By Alex645
Replies: 13
Views: 730
If the DXO charts are accurate, then everything I've posted on your thread is not true. However, what I've posted is not based on my own scientific tests but rather my personal experience and observations when shooting below the base ISO number into the Lo options.

The 645D processor could make a difference when shooting jpegs, but I shoot RAW 99% of the time and I assume the DXO chart is based on RAW data.

I also know that on many cameras, you can shoot extended ISO only as jpegs. To quote JM Peltier: Here’s an example of how Extended ISO works on a camera that has a Native ISO range of 200:

You set your ISO to 100. The minimum amplification that the sensor is capable of is ISO 200. So the sensor will output an overexposed image at ISO 200, then the processor will pull the exposure down one stop to an equivalent ISO of 100.


The 645D's Kodak KAF-40000 sensor has a native ISO of 200. So any extended lower ISO is processing, so I don't understand how the DXO test shows improved performance in those three categories over the base ISO.

The conflicting input you've gotten in this thread can be resolved if you run your own real world test comparison on your 645D.

---------- Post added 02-06-21 at 02:06 PM ----------

Just found this comparison on line. Click on the ISO 100 and compare it to the ISO 200.

Look carefully at the highlights. You'll see they are better controlled and less blown out at ISO 200 which is counterintuitive unless the extended 100 ISO reveals the pixels can't handle the over-exposed highlights.

Pentax 645D medium format digital camera ? The Register
Forum: Pentax Medium Format 02-05-2021, 12:18 PM  
645D: better at 200 or 100 ISO?
Posted By Alex645
Replies: 13
Views: 730
Yes and please share your results on this thread. The key will be what happens in the highlights like clouds in higher contrast lighting.
Forum: Troubleshooting and Beginner Help 02-05-2021, 12:04 PM  
Camera won't turn on
Posted By Alex645
Replies: 15
Views: 968
Congratulations for the easy fix.

With a 6MP sensor, you are forced to look for a longer focal length. With a larger sensor (I'd recommend at least 15MP) you can crop significantly with your current lens and achieve the equivalent of >300mm.

Some examples on the most affordable end:

K20D or K7=15MP
K5, K5ii, K30, K50, K500=16MP

I also noticed a Pentax 55-300mm F/4-5.8 SMC DA ED on KEH in excellent condition for $130.

9 out 10 times, I'd recommend upgrading the lens. In your case, I'd recommend the camera. If you can live without shooting birds, then enjoy your current gear.
Forum: Pentax K-1 02-04-2021, 02:34 PM  
I would like to go full frame, but ...
Posted By Alex645
Replies: 42
Views: 1,824
I love photography so much, that I do and use whatever it takes to get the image quality that inspires me.

I've spent days walking miles with a Pentax 645 medium format and at least two prime lenses, so to me a camera is too heavy when my heart and mind is not into photography.

Of course there are always lighter, smaller, and less bulky ways of shooting that are easier, but ease and convenience are not high on my priority when it comes to photography.

A large format photographer may call me a hypocrite because I have drawn the line to not shoot with view cameras, but when it comes to weight, shooting with lighter prime lenses has helped me working with heavier cameras.
Forum: Pentax Medium Format 02-04-2021, 11:37 AM  
645D: better at 200 or 100 ISO?
Posted By Alex645
Replies: 13
Views: 730
Congratulations on your new 645D!!!

In my experience, the base sensitivity of digital sensors is similar to the base sensitivity of film emulsions. At the native ISO you get the best performance mostly in terms dynamic range and to a lesser degree color rendition. At a lower ISO than the base, highlights begin to lose details and colors become less saturated.

ISO is a quality certification set by the International Standardization Organization. ISO numbers meet or exceed ISO quality standards. Lo and Hi settings don't, and thus are generally not recommended, but Pentax and others give us this option but cannot call it 100 ISO even though it is effectively 100.

If you've had any slide film experience, it's similar to pull processing by one stop. You can do it, it will maintain your mid tone exposures, but there are artifacts due to the processing compensation.

The best way to know if it's acceptable to you is to run tests to get to know how your camera performs at all ISO and Lo/Hi settings in low light, bright light, and high contrast lighting.
Forum: Troubleshooting and Beginner Help 02-03-2021, 04:52 PM  
Camera won't turn on
Posted By Alex645
Replies: 15
Views: 968
Lithium and Alkaline batteries have similar voltage but not the same amperage as measured in mAh. I've had situations where devices made before lithium cells were available work fine with lithium batteries and others that didn't.

I'd recommend trying alkaline batteries next.
Search took 0.02 seconds | Showing results 1 to 25 of 300

 
Forum Jump


All times are GMT -7. The time now is 11:41 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top