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Forum: Pentax Film SLR Discussion 16 Hours Ago  
Post your B&W Film shots
Posted By tuco
Replies: 9,213
Views: 1,032,693
Yes, both cameras fit in a small day pack. The cameras are identical except for the focal lengths of course (65mm and 90mm). I find a lot of shots with the 65mm focal length. At f16 you get a lot DOF for a 6x9 format and that is important for many of my pictures.

The 90mm is more of a challenge to get really near and far DOF. And with 100 film and low light stopping down to f22 with color filters to get DOF can mean using the crapy T-mode the camera has (no bulb) or just too slow of a shutter speed for motion. To get deep DOF with the 90mm on my 6x17 camera, for example, I often have to stop down to f32. But of course there are times when I need a longer focal length and the GW will help with that.
Forum: Pentax Film SLR Discussion 21 Hours Ago  
Post your B&W Film shots
Posted By tuco
Replies: 9,213
Views: 1,032,693
No Trespassing

GSW690III, 400TMY, D-23


No Trespassing by tuco, on Flickr
Forum: Film Processing, Scanning, and Darkroom 1 Day Ago  
Compensate expired B&W film
Posted By tuco
Replies: 5
Views: 298
Develop it normally.
Forum: Pentax Film SLR Discussion 1 Day Ago  
Post your B&W Film shots
Posted By tuco
Replies: 9,213
Views: 1,032,693
Checking out a film/developer combo on a scene I've photographed before.

Fuji GSW690III, Fujinon 65mm, 400TMY, D-23


Pay Here by tuco, on Flickr
Forum: Pentax Film SLR Discussion 1 Day Ago  
Post your B&W Film shots
Posted By tuco
Replies: 9,213
Views: 1,032,693
Wow, that's billions of micro seconds ago. :o
Forum: Pentax Film SLR Discussion 2 Days Ago  
Post your B&W Film shots
Posted By tuco
Replies: 9,213
Views: 1,032,693
I had to order a hair clipper kit. I haven't been to a barber yet but I will in order to fix all the mistakes.
Forum: Pentax Film SLR Discussion 2 Days Ago  
Post your B&W Film shots
Posted By tuco
Replies: 9,213
Views: 1,032,693
Who needs a haircut right about now?

Fuji GSW690III, EBC 65/5.6, 400TMY, D-23


Who Needs A Haircut? by tuco, on Flickr
Forum: Pentax Film SLR Discussion 2 Days Ago  
Post your B&W Film shots
Posted By tuco
Replies: 9,213
Views: 1,032,693
You're being watched

Fuji GW690III, Fujinon EBC 90/3.5, 400TMY, D-23 1:1


All-Seeing Eye by tuco, on Flickr
Forum: Troubleshooting and Beginner Help 05-26-2020, 01:06 PM  
Pentax 67 165 Leaf Shutter + Extension Tubes
Posted By tuco
Replies: 21
Views: 800
Looks good. I've done almost that tight without an extension tube plus a small crop.
Forum: Troubleshooting and Beginner Help 05-23-2020, 03:43 PM  
Pentax 67 165 Leaf Shutter + Extension Tubes
Posted By tuco
Replies: 21
Views: 800
You'll have to see but I doubt it. I'm away from my extension tubes to to have look. But here here is the 105mm plus #1 ext tube and I was right in subjects face with the camera.


Faces by tuco, on Flickr
Forum: Post Your Photos! 05-22-2020, 08:22 AM  
Architecture Art Deco by moonlight
Posted By tuco
Replies: 4
Views: 167
I love the composition and subject. But just like a movie, if you can see the special effects, it is a distraction, IMHO.
Forum: Pentax Film SLR Discussion 05-21-2020, 10:48 AM  
Post your B&W Film shots
Posted By tuco
Replies: 9,213
Views: 1,032,693
You can get an idea of the type of developer used maybe. I'd think if you are developing film (without specific instructions) for the public, you gotta use a box speed developer. And depending on volume if you'd use a replenishment developer. And I bet the nature of the developer would be to yield a longer toe in characteristic response of the film than you might get with another developer choice.
Forum: Pentax Medium Format 05-20-2020, 09:47 AM  
Post your medium format photos!
Posted By tuco
Replies: 14,432
Views: 2,454,669
Well, just so I don't have to stand tall before the man, the panic button and the iconic Swiss Army Knife was my attempt at, "...I think I was trying to suggest something about the the duality of man, sir". :)

But on a more serious note, I think those panic buttons are more of a problem than a help these days when you hear so many false alarms.
Forum: Troubleshooting and Beginner Help 05-19-2020, 06:38 PM  
Pentax 67 165 Leaf Shutter + Extension Tubes
Posted By tuco
Replies: 21
Views: 800
I tried to make a face. Is this about how tight you wanted to get your head shots? You can step back just a little more with this 165mm/#2 ext tube combo.
Forum: Pentax Medium Format 05-19-2020, 05:38 PM  
67 55mm f4 vs 645 55mm f2.8
Posted By tuco
Replies: 22
Views: 862
Right, that slipped my mind.

I'd add for people looking to purchase some 6x7 lenses on a budget can take advantage of knowing when there is no optical change between say a 6x7 and 67 generation lens if aesthetic appeal is not important. Often 67 versions of the lens command a higher price optics change or not. So a lens like the 67 55/4 or 67 200/4 you may want to pay extra for the 67 generation and get 6x7 generations lenses when you find them cheaper. They still need to be in good shape of course.
Forum: Troubleshooting and Beginner Help 05-19-2020, 05:26 PM  
Pentax 67 165 Leaf Shutter + Extension Tubes
Posted By tuco
Replies: 21
Views: 800
With no lens or extension tube on the camera, fire it in bulb mode. Watch the shutter level go up and down. Now ask yourself what would jam the mirror right now with nothing even attached to the body? Preventing the shutter lever from completing its full travel perhaps that would be bad. Any mechanically timed or linked parts could jam. Apart from an already broken camera I see nothing else. Can anyone add another mirror jam failure mode here?

Okay now mount a 165mm LS with no extension tube in regular mode. The camera's shutter lever pushes the aperture lever on the lens. The aperture lever allows the camera body's shutter lever to go full travel like all lenses. So what could jam things up now is if the lens's aperture lever jammed partially through its travel preventing full travel on the camera body. And since the aperture lever on also trips the leaf shutter in that mode it could possible jam the lever. And that can happen extension tube or not.

Now mount an extension tube. Look at the #2 or #3 tube lever mechanism on the lens side. Notice a safety feature not found without the extension tube interface? It's a force relief lever. That is, if the force on the aperture lever is greater than on the spring tension, the camera's shutter lever can still go full travel anyway and avoiding any damage. The biggest problem I see is stacking extension tubes. The aperture lever side of the stack-up gets weaker and maybe not overcome the extra force to trip the 165LS in LS mode. But that still doesn't look catastrophic.

I'm open to understanding this better.
Forum: Pentax Film SLR Discussion 05-19-2020, 01:21 PM  
Post your B&W Film shots
Posted By tuco
Replies: 9,213
Views: 1,032,693
I'm sure the roll will still take good pictures. It's just when do you feel you'll get the best from the last roll. Tomorrow there could be better subjects to use on but it's too late, kind of a thing... arg. Man, that's gotta suck about not shooting you last rolls of the stuff.
Forum: Pentax Medium Format 05-19-2020, 10:38 AM  
67 55mm f4 vs 645 55mm f2.8
Posted By tuco
Replies: 22
Views: 862
The optics are the same for the 90mm between the 67 and 6x7 (1980) generations. It's the leaf shutter version that is different.

The optics are unchanged between the 1969, 1971 and 1989 versions of the 75mm/f4.5. It's the 75mm 2.8 and shift lens that have different optics.
Forum: Pentax Medium Format 05-19-2020, 09:54 AM  
Post your medium format photos!
Posted By tuco
Replies: 14,432
Views: 2,454,669
Pentax 67, 400TMY


Lens + Ext Tube Test by tuco, on Flickr
Forum: Pentax Film SLR Discussion 05-19-2020, 08:16 AM  
Post your B&W Film shots
Posted By tuco
Replies: 9,213
Views: 1,032,693
I have one, 120 roll of Agfa Pan 25 remaining with an expiration date of July, 1990. Do you save it or use it up?
Forum: Troubleshooting and Beginner Help 05-19-2020, 07:30 AM  
Pentax 67 165 Leaf Shutter + Extension Tubes
Posted By tuco
Replies: 21
Views: 800
Don't use ML. Look at the rear element/aperture lever of both a LS and regular lens. How does a extension tube know there is a leaf shutter lens attached? It doesn't. They function identically to the camera and the extension tube. If you can accidentally lock up a mirror with a LS lens you can lock it up with a regular lens using an extension tube.
Forum: Troubleshooting and Beginner Help 05-18-2020, 10:08 PM  
Pentax 67 165 Leaf Shutter + Extension Tubes
Posted By tuco
Replies: 21
Views: 800
The leaf shutter is triggered by body. The extension tube just extends that level. It's going to trip the lens or not. Where and how that can lock up the mirror is beyond me.
Forum: Troubleshooting and Beginner Help 05-18-2020, 08:23 PM  
Pentax 67 165 Leaf Shutter + Extension Tubes
Posted By tuco
Replies: 21
Views: 800
Pentax 67, 165mm LS, #2 Ext Tube, 400TMY, D-23 1+1

Flash sync lens @ 1/60s, camera body @ 1/4s, Transmitter connected to the lens.
The Extension Tube Manual gives exposure compensation for most the mild telephotos at 1.9X +/- 0.1.


Lens + Ext Tube Test by tuco, on Flickr
Forum: Troubleshooting and Beginner Help 05-18-2020, 07:44 AM  
Pentax 67 165 Leaf Shutter + Extension Tubes
Posted By tuco
Replies: 21
Views: 800
I think I'll try it too avoiding mirror lock up and slowing down the camera body shutter speed to 1/4 sec in lieu of the maximum allowed of 1/8 sec for the 165LS ( here is where built-up tolerances in the ext tube linkage may be a factor). My 6x7 and 67 cameras are configured with a waist level finder. The flash not firing is common on my 6x7 and 67 cameras. The Pentax flash terminal is not a snug fit and the cord connection can become loose. Having a locking feature like what Zeiss does on some of their System V camera lenses would be sweet.
Forum: Troubleshooting and Beginner Help 05-17-2020, 07:22 AM  
Pentax 67 165 Leaf Shutter + Extension Tubes
Posted By tuco
Replies: 21
Views: 800
Give it a try. I just attached my 165 LS to an extension tube and I also see the LS feature works (every time). So what's stopping it from taking a picture?

EDIT: And my AF 400T flash successfully fired.
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