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Forum: Troubleshooting and Beginner Help 09-20-2017, 01:46 PM  
Fast lenses and F stops
Posted By noblepa
Replies: 24
Views: 1,049
To the OP: If you're still confused about aperture sizes (f/stops), I suggest you get a copy of Bryan Peterson's "Understanding Exposure". It explains how apertures are calculated, and how and when to use the various options.

As others have said, aperture size, among other thijngs, affects depth of field. Peterson explains the almost infinite combinations of "correct" exposure values for any situation, and then discusses which one to choose for the photographic effect you are looking for.

I've been an amateur photographer since 1967 and I still learn something from the book every time I look at it.
Forum: Pentax Film SLR Discussion 09-06-2017, 01:18 PM  
Super Takumars on Spotmatic F
Posted By noblepa
Replies: 11
Views: 610
There are a few of the later Super Takumars that have the open-aperture couplings for use on the Spotmatic F, ES and ES II. Technically the SMC designation refers to the improved, multi-layer lens coating. It just so happened that the open-aperture metering and the SMC coatings came to market around the same time.

I suspect that the SMC coatings were not quite ready for prime time, when the SP-F was introduced. Rather than wait for the new coatings, Pentax opted to add the coupling to the ST lenses, so they would have something to put on the SP-F. Remember, at the time, Pentax was being widely criticized for sticking with stop-down metering, while most other camera makers had come up with some form of open-aperture metering.
Forum: Pentax Film SLR Discussion 09-01-2017, 01:55 PM  
Spotmatic SP F vs F
Posted By noblepa
Replies: 6
Views: 550
I don't remember if Honeywell imported the Spotmatic F, or if it was introduced after Pentax set up their own import subsidiary.

I mention this because, in the Honeywell era, the plain old Spotmatic had no model designation engraved on the top plate, in the Honeywell version.

In the Asahi version, there was an SP engraved on the top plate. Honeywell may have carried forward the same quirk on the Spotmatic F.
Forum: Pentax Film SLR Discussion 09-01-2017, 01:51 PM  
Super Takumars on Spotmatic F
Posted By noblepa
Replies: 11
Views: 610
Unlike the Spotmatic SP, on the Spotmatic F, that switch ONLY stops the lens down. The meter is on all the time. There is no way to turn the meter off. For that reason, a lens or body cap is imperative when the camera is not in use. Without it, the battery will almost surely be dead the next time you wish to use the camera.
Forum: Visitors' Center 09-01-2017, 12:53 PM  
Old Pentax lens on a new digital format
Posted By noblepa
Replies: 11
Views: 834
I especially like using the 50mm, f/1.4 Super Takumar from my Spotmatic on my K10d.

Having cut my photographic teeth on a Spotmatic, manual focusing and stop-down metering don't bother me in the slightest.
Forum: Troubleshooting and Beginner Help 08-22-2017, 02:00 PM  
Which mounting on my Spiratone TC 200mm F4.5?
Posted By noblepa
Replies: 6
Views: 324
The last picture shows the letters MIR on the adapter. Is it possible that this is a t-mount for a Miranda camera? I thought that they were bayonet, but a quick google search reveals that some early models used an M44 screw mount.

Apparently the M44 mount had a registration distance of 41.5mm, while M42 (Pentax screw mount) has a registration distance of 45.46mm. This might account for the deeper adapter.
Forum: Pentax DSLR Discussion 08-15-2017, 01:01 PM  
Pentax Auto 110 super
Posted By noblepa
Replies: 7
Views: 500
The only real functional difference between the Auto 110 and the Auto 110 Super, AFAIK, was that the super advanced the film with a single stroke of the lever, while the Auto 110 required two strokes.

The cameras were so simple, I'm not sure what functional differences there could possibly have been.

Now, if you really want a rare one, find one of the transparent plastic-bodied demonstration models that Pentax made back in the day. Unlike the transparent 35mm cameras that Pentax made, the clear Auto 110 was fully functional. The mirror box was opaque and the film cartridge maintained light tight-ness at the back. They show up on eBay every once in a while and sell for several hundred dollars.
Forum: Pentax DSLR Discussion 08-15-2017, 12:46 PM  
Pentax Micro 4/3 cameras.
Posted By noblepa
Replies: 50
Views: 2,756
I think he is simply alluding to the fact that 110 film used an image of 13 x 17mm, approximately the same size as 4/3. Pentax had no part in developing the 4/3 digital camera system.

For that matter, Pentax had no more involvement in the development (no pun intended) of the 110 film format than they did of the 35mm format. Kodak was, AFAIK, solely responsible for the 110 film format. It was introduced in 1972 as a follow-on product to their highly successful 126 Instamatic format.

Pentax merely developed their own Auto 110 SLR to use that film format. I remember the ads for the Auto 110. It was marketed to people who wanted a quality camera that they could carry around in a briefcase or purse.

Minolta is the only other camera maker I know of who made a 110 SLR. Were there any others?
Forum: Pentax Film SLR Discussion 07-17-2017, 12:53 PM  
Issue with newly aquired Pentax K1000 or beginners mistake?
Posted By noblepa
Replies: 14
Views: 851
I had a Spotmatic that did that once. It turned out that it was definitely shutter capping, or dragging.

Since the K1000 is basically a Spotmatic with open-aperture metering and a bayonet mount, there are a lot of similarities.

The camera has two shutter gear trains. One for slow speeds (1/60 and longer) and high speeds (1/125 and shorter). The problem usually manifests itself more on the higher speeds than on the lower ones.

Its easy to test, but it requires using a roll of film. Put the camera on a tripod and take multiple shots, starting with as long an exposure as you can manage, definitely longer than 1/60 second. Take successive exposures at faster shutter speeds. You don't need to have the negatives printed (save a little money). Examine the negatives. I think you will find that the lower shutter speeds are okay, while the higher speeds get progressively worse. At high enough speeds, depending on how bad the shutter is, the negative may be completely blank, or nearly so.

BTW, as a new K1000 user, you may not be aware that the meter in a K1000 is always on. It only shuts off when a lens or body cap is used. So, a lens cap is imperative when not using the camera. Otherwise, the battery will drain.
Forum: Pentax DSLR Discussion 07-17-2017, 12:41 PM  
Fan made pentax dslr genealogy
Posted By noblepa
Replies: 18
Views: 1,483
I'm not sure that the K100d and K110d can be considered descendants of the K10d.

First of all, I may be mistaken, but I believe that the K100d was released first.

Secondly, the K100d and K110d did not have the electrical contacts to allow use of SDM lenses. The K10d did. The K100d Super added those contacts.

The K100d/K110d used a 6MP sensor, while the K10d is 10MP.

I don't believe that the K110d was named to avoid confusion with the K1000 film camera. The K100d and K110d were released at the same time. The K100d has shake reduction, while the K110d does not. It turns out that they couldn't give the K110d away, so Pentax has never made another camera without SR. I tried to find one on ebay, with no luck. There really aren't many of them out there.

The K110d is definitely not a descendant of the K100d. More like a sibling. They were introduced simulateously.

It is an impressive effort.
Forum: Pentax Film SLR Discussion 06-21-2017, 07:47 AM  
PENTAX auto 110 advance lever
Posted By noblepa
Replies: 4
Views: 508
Strangely enough, I have an Auto 110 sitting on my desk at work. I brought it in to show to another Pentax afficionado and never took it home.

Open the back of the camera. As you look at it, in the lower left corner of the frame, there is a tiny pin. This pin is a follower that detects the registration hole in the film. When the film has advanced enough, this pin pops into the hole and stops any further advance. You can use your thumbnail to move the pin and trick the camera into thinking that there is film in the camera.

The original Auto 110 took two strokes on the film advance lever to advance a full frame. The later Auto 110 Super only required one stroke.

Its a cool little camera. I wish that someone besides Lomo still made 110 film.
Forum: Pentax K-01 06-09-2017, 10:46 AM  
How long can I record video with the K01?
Posted By noblepa
Replies: 14
Views: 900
It is my understanding that we have Bill Gates to thank for the 4GB limit. The FAT32 file system used on SD cards up to 32GB has a file-size limit of 4GB. SDXC cards larger than 32GB use the exFAT file system, which removes that file size limitation.

https://en.wikipedia.org/wiki/ExFAT

You might try buying a 64GB card. The camera should automatically switch to exFAT. Just make sure that your computer can handle exFAT.
Forum: Troubleshooting and Beginner Help 05-25-2017, 01:03 PM  
First Spotmatic Question
Posted By noblepa
Replies: 3
Views: 449
My very first camera was a Spotmatic (not a SP-F), so I grew up on stop down metering. On the Spottie, the switch has two functions: it stops the lens down and it turns on the meter. On the SP-F, it only stops the lens down.

On my Spottie, which was not capable of open-aperture metering, I used preset lenses a lot, party because they were cheaper and partly because I had to stop down to meter anyway.

What I did with my preset lenses was to set the aperture to its smallest setting, usually f/16 or f/22, and leave it there.

I then simply used the stop down ring to find the correct exposure and then trip the shutter. This means that I often took pictures at odd settings like f/4.7 or f/8.3, as there were no detents on the stop-down ring.

One important thing to note about the Spotmatic-F. The meter is ALWAYS ON. So, a lens cap is imperative. Otherwise the meter will drain between uses. If you store the camera without a lens, use a body cap.
Forum: Pentax DSLR Discussion 05-08-2017, 08:05 AM  
Here's a way to identify a specific(Pentax) camera in exif data:
Posted By noblepa
Replies: 5
Views: 1,113
The serial number is already in the exif data.
Forum: Pentax Film SLR Discussion 04-28-2017, 01:45 PM  
Honeywell Pentax Spotmatic Models
Posted By noblepa
Replies: 11
Views: 793
The Electro-Spotmatic is not the same as the ES.

pentax electro spotmatic - Google Search

The Electro-Spotmatic, as I understand it, was very problematic for Asahi. They redesigned the electronics for it and released the ES, which was sold in Japan as an Asahi and in the US as a Honeywell.
Forum: Pentax Film SLR Discussion 04-21-2017, 12:48 PM  
Honeywell Pentax Spotmatic Models
Posted By noblepa
Replies: 11
Views: 793
The Honeywell Spotmatics have no model designation on top.

The SL has "SL" engraged on top. This is the meterless version of the Spotmatic.

The SP500 and SP1000 have "SP 500" or "SP 1000" engraved on top.

The Spotmatic II has SPII engraved on top.

The Spotmatic IIa (a Honeywell-only version, no Asahi version) has "SP IIa" on top; This was a special version to communicate with certain Honeywell Strobonar flash models. Since the Strobonars were made by Rollei in Germany, Asahi did not make a version for sale in Japan or other non-US countries.

I believe that the Electo-Spotmatic was not sold in the US, so there was no Honeywell version.

The Spotmatic ES and ES II had "ES" and "ES II" engraved on top.

The Spotmatic F had "SP F" on top.

As far as I know, all Honeywell Spotmatics had no identifier on top. This is the only Honeywell model that did not. Conversely, all Asahi Spotmatics had SP on top.
Forum: Pentax Film SLR Discussion 04-21-2017, 12:37 PM  
Newbie with a question
Posted By noblepa
Replies: 6
Views: 726
A good way to determine the actual value is to search ebay completed auctions.

A working Spotmatic, with a working meter (somewhat of a rarity these days) will typically go for $35-50 without a lens. Yours looks to be in pretty good condition. The 50mm, f/1.4 lens is very nice. I have one and use it on my Pentax K10d dslr.

One thing to look for on the 50mm lens is that there was one version that used a slightly radioactive element (thorium, I think) in the lens glass. Over time, this will turn the lens amber. It is easy to clear it up by exposing the lens to UV light, either with a UV lamp or by putting it on the window sill for a week or two. Don't worry, it is not dangerous.

Be careful of active ebay listings. Some sellers have highly inflated ideas of the value of their cameras. One can ask anything they like for the camera. What counts is what they actually sell for. That's why you check the completed listings.
Forum: Pentax DSLR Discussion 04-18-2017, 12:38 PM  
Simple dSLR
Posted By noblepa
Replies: 45
Views: 2,272
The problem is that most of the so-called "frills" that people want to eliminate are done in software. Eliminating them does nothing to reduce the cost of manufacturing a camera. It would cost the same to burn the ROM with the stripped-down firmware, as it does to burn the fully-featured firmware.

Eliminating physical components, such as the SR mechanism, would reduce the cost of manufacturing the camera, but not by much. Besides, Pentax tried the K110d (no SR) alongside the K100d (SR). They couldn't GIVE the K110d away. No one wanted it, when, for only a little more, you could get the SR-equipped camera.

The expensive hardware components, such as the rear screen, would offer the biggest savings, but I doubt that there is much of a market for a camera with no rear screen. One of the advantages of today's digital cameras is "chimping". If you have to wait until you get home to see if the image is okay, you might as well use film.

Software development costs wouldn't really be reduced, either. I'm sure that the software in Pentax cameras is very modular and is reused from one model to the next. So, totally new features, such as pixel shift, may take some development, for the first one, but the next camera probably needs very little programming to make it work.

My 1967 Spotmatic cost me $220 brand new, with a 55mm, f/1,8 lens. In today's dollars, that's around $1,200. That's what simplicity would cost. By comparison, today's dslrs are a bargain. You're not going to see a $200 dslr.
Forum: Visitors' Center 04-11-2017, 11:26 AM  
Pentax Spotmatic Lenses
Posted By noblepa
Replies: 4
Views: 682
All M42 lenses, whether Pentax or other manufacturers will work on any Pentax dslr with an adapter.

However, the OP may not realize that they will not autofocus. Nor will the camera be able to control the aperture. It won't even close the aperture down at the momenr ot exposure.

As the OP seems to be a Spotmatic user, he/she will not be uncomfortable doing "stop down" metering.

There is a topic, elsewhere in this forum, discussing just this topic: Using Manual Lenses (M42 Screwmount, M , K) on Pentax DSLRs F-- - PentaxForums.com

I love using my 50mm, f/1.4 Super Takumar on my K10d.
Forum: Pentax DSLR Discussion 04-03-2017, 08:41 AM  
The K10D Club!
Posted By noblepa
Replies: 3,307
Views: 303,312
Wouldn't it be easier to go into the camera menu and dial back the contrast and saturation?

If you still want to sand the glass on a UV filter, try using toothpaste. It is an extremely fine abrasive. I'm not sure, but I think its equivalent to about 5,000 grit sandpaper. I use it to clean the clouded plastic covers on my cars headlights. You can also get up to at least 3,000 grit paper at an autoparts store, or a store specializing in automotive paints.
Forum: Troubleshooting and Beginner Help 03-28-2017, 12:52 PM  
Tele-Astranar 1:6.3 f=400 mm doesn't fit on Pentax ME
Posted By noblepa
Replies: 15
Views: 759
A T-mount lens DEFINITELY has a threaded mount. It is similar to the M42 screw mount lenses used by earlier Pentax cameras, such as the Spotmatic. However, the thread is 42mm x 0.75 t/mm, while the M42 is 42mm x 1.0 t/mm. The t-mount lens also allows for the thickness of the adapter.

What you describe is exactly what I was talking about. The grooved part is the threaded portion. It may be on your lenses too tightly to remove easily, but it is definitely not part of the lens. You do have the alignment mechanism. You loosen the three screws and turn the lens until the aperture/focus markings are on top, then re-tighten the screws.

Unless your adapter is frozen to the lens, the entire adapter should just unscrew from the lens.

T-mount - Wikipedia
Forum: Troubleshooting and Beginner Help 03-27-2017, 07:43 AM  
Tele-Astranar 1:6.3 f=400 mm doesn't fit on Pentax ME
Posted By noblepa
Replies: 15
Views: 759
The grub screws do not hold the adapter to the lens. The adapter actually consists of two pieces. One piece has the camera mount, while the other has the fine threads to connect to the lens.

The grub screws are there to allow you to align the focus and aperture markings so that they are on the top of the lens.

The adapter simply unscrews from the lens. It is simply a friction fit. There is no locking mechanism.

Its possible that the adapter the OP has is really a Nikon F-mount, which is very similar to a Pentax K-mount. Are there any markings on the adapter? If it is a Pentax mount, it should have P/K engraved on it somewhere. If it is a Nikon mount, it will have NI or N engraved.
Forum: Visitors' Center 03-15-2017, 08:05 AM  
Stuck lens on Pentax k-3
Posted By noblepa
Replies: 13
Views: 1,003
I thought that all Pentax dslrs had metal frames, covered by a plastic skin. If so, would the screws be threaded into the underlying metal, rather than the plastic skin?
Forum: Pentax DSLR Discussion 02-10-2017, 09:14 AM  
The K10D Club!
Posted By noblepa
Replies: 3,307
Views: 303,312
Indeed. I've printed 16 x 20 prints from my K10d images. If you get really, really close and use a magnifying glass, you can see some pixilation. But, a print that large is intended to be viewed from at least three feet. At that distance, it looks just fine. To be fair, the image is almost completely uncropped.

However, I have a few images that I would like to crop a small portion of and print. Once I crop it, so I don't have a print that is 80% blue sky, I am left with a 2 or 3 megapixel image. Now, THAT can't be enlarged to 16 x 20, or even 11 x 14. In those cases it would be nice to start with 20-24 Mp.
Forum: Troubleshooting and Beginner Help 02-10-2017, 09:08 AM  
Photographic release form!
Posted By noblepa
Replies: 20
Views: 1,160
IANAL, and I can't offer an legal opinion regarding the wording of the RCCL, contract.

However, even if it can be interpreted to say that they "own" your photographs, in reality, all they are saying is that you can't use any photographs you take for commercial purposes. IOW, if, say, you own a travel agency, you can't use your vacation photographs in your brochure. Nor can you sell such photographs to someone else to use in THEIR brochure. You're free to make as many copies as you like for personal use.

The same is true of almost any resort. You can't go to Disneyland or Disneyworld, take a photograph of Cinderalla's Castle and use it for commercial purposes.
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