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Forum: Pentax Film SLR Discussion 06-02-2019, 07:49 PM  
Any tips for refinishing a K1000?
Posted By Ropuchy
Replies: 24
Views: 806
Thanks for the input!

I'd be repainting the trim above and bellow the leatherette, not any other parts of the camera.

---------- Post added 06-02-19 at 07:53 PM ----------


Ah, that'd probably work too.

Aki-Asahi has a YouTube channel, and they show using plain water for positioning the seals and leather, so I'd probably end up doing that.
Forum: Pentax K-5 05-30-2019, 09:18 AM  
new user- cif & minimum shutter speed with manual lens
Posted By Ropuchy
Replies: 5
Views: 442
I got my K-5 last summer and have been very happy with it so far. Hopefully you'll like yours as much as I have mine!
When using the in-body stabilization, you must half-press the shutter button until the 'green shaky hand' appears in the viewfinder. This is something I didn't know at first and isn't immediately noticeable.


If you haven't already, I'd recommend glancing through the manual and reading up on any of the features that catch your eye. http://www.ricoh-imaging.co.jp/english/support/man-pdf/k-5.pdf
Forum: Pentax Film SLR Discussion 05-30-2019, 08:37 AM  
Any tips for refinishing a K1000?
Posted By Ropuchy
Replies: 24
Views: 806
Thanks for the suggestion. Your M2 looks pretty sharp!
Forum: Pentax Film SLR Discussion 05-29-2019, 06:40 PM  
Any tips for refinishing a K1000?
Posted By Ropuchy
Replies: 24
Views: 806
The instructions for the Aki-Asahi seals suggest using alcohol to delay the adhesive while putting in the seals.

---------- Post added 05-29-19 at 06:41 PM ----------


Ah, right. Forgot about the film counter. Thanks for the reminder!

---------- Post added 05-29-19 at 06:48 PM ----------


Glad your custom seals have been working out well!

For the corrosion, I wasn't planning on hiding it with paint; it's very mild and won't be an issue to clean up. I'd be painting after cleaning it.

For your XR7 and Chinon, maybe you could buy a kit from Aki-Asahi and retrofit it to them?
Forum: Pentax Film SLR Discussion 05-28-2019, 08:21 PM  
Any tips for refinishing a K1000?
Posted By Ropuchy
Replies: 24
Views: 806
Arlight.
Do you know if the kit comes with multiple sets of foam in-case you mess something up, or would it be pretty hard to?
Forum: Pentax SLR Lens Discussion 05-28-2019, 08:17 PM  
Some questions about lens design diagrams and a type of element
Posted By Ropuchy
Replies: 27
Views: 995
Thank you for tracking that down for me!
I'll mess around with it a bit, maybe try to recreate some of my lenses.
Forum: Pentax Film SLR Discussion 05-28-2019, 07:26 PM  
Any tips for refinishing a K1000?
Posted By Ropuchy
Replies: 24
Views: 806
Ah ok, thanks!

What is it that make his seals better than other offerings?
Forum: Pentax Film SLR Discussion 05-28-2019, 07:07 PM  
Any tips for refinishing a K1000?
Posted By Ropuchy
Replies: 24
Views: 806
Do you have any suggestions for light seals?
The leatherette either wasn't cut correctly or has shrunk over time, there are gaps along the edges where it should be. I'd still be keeping the old leatherette if I replaced it.
I've noticed a small amount of corrosion on the now-exposed iron/steel where the trim used to cover. I'm wanting to repaint it to inhibit any further corrosion. And While I can appreciate some patina, the trim paint is just falling off and there will be little left if I continue to use the camera.

Thank you for the input!

---------- Post added 05-28-19 at 07:11 PM ----------


That Spotmatic turned out very well! I'd guess the K1000 would take even less time as it's even simpler.
I was thinking of getting the Black Crinkled Emboss because it isn't too flashy and would probably go well with the camera. Nice to hear that they give you a practice set!

Do you have a link to Jon Goodman's light seals?


Thank you!
Forum: Post Your Photos! 05-28-2019, 03:18 PM  
Black & White Pre-War Playthings
Posted By Ropuchy
Replies: 8
Views: 294
That fire extinguisher must be camera shy, hiding behind the tire of the Buick.
Forum: Pentax Film SLR Discussion 05-28-2019, 03:15 PM  
Any tips for refinishing a K1000?
Posted By Ropuchy
Replies: 24
Views: 806
I have a K1000 SE, but the leatherette is peeling a bit, the enamel on the trim is mostly chipped away, and the light seals are more light than seals.

Aki-Asahi has ready made kits for both the leatherette and light seals. Should I get them from there, or are there better options?

I'm not too sure what to do for the enamel. I'd think painting something on by hand would work best, but I'm unsure what sort of paint to use.
Forum: Pentax SLR Lens Discussion 05-28-2019, 02:59 PM  
Some questions about lens design diagrams and a type of element
Posted By Ropuchy
Replies: 27
Views: 995
Yep, at least I know how to do trigonometry.
I'll look into the lens design programs, and see if I can find a site similar to what you describe. Thanks!
Forum: Pentax SLR Lens Discussion 05-27-2019, 06:23 PM  
Some questions about lens design diagrams and a type of element
Posted By Ropuchy
Replies: 27
Views: 995
No worries, I was still able to get them to work. Thanks for fixing them!

---------- Post added 05-27-19 at 06:29 PM ----------


Well, I haven't gone to college yet, so that doesn't bode well.
I'll have to look at your suggestions and see what suits me. Thank you for all the input and suggestions!
Forum: Pentax SLR Lens Discussion 05-24-2019, 11:18 AM  
Some questions about lens design diagrams and a type of element
Posted By Ropuchy
Replies: 27
Views: 995
Thanks for the links! I'll look into them when I've got some time, the Edmunds one looks interesting.

Also, it looks like 'http://' was added onto the ends of the two middle links, so they won't work correctly when you click on them.

---------- Post added 05-24-19 at 11:22 AM ----------


I actually like maths, just not the stuff they teach in school unfortunately. Do you know of any more technical and to-the-point sorts of books with less reading, or would 'Optics' by Hecht still be a good place to start?
Forum: Pentax SLR Lens Discussion 05-23-2019, 12:57 PM  
Some questions about lens design diagrams and a type of element
Posted By Ropuchy
Replies: 27
Views: 995
Alright, thanks for clarifying!
Forum: Pentax SLR Lens Discussion 05-23-2019, 07:44 AM  
Some questions about lens design diagrams and a type of element
Posted By Ropuchy
Replies: 27
Views: 995
Ah, thank you very much for the info!

If the element is two parts, is it only counted as a single element because it forms a biconvex element? In other diagrams, I see multiple elements put together, but they're counted distinctly. (Like the 5th and 6th elements in the M28/2) SMC Pentax-M 28mm F2 Reviews - M Prime Lenses - Pentax Lens Reviews & Lens Database

---------- Post added 05-23-19 at 07:45 AM ----------


Thanks for the diagrams!
Forum: Pentax SLR Lens Discussion 05-22-2019, 06:44 PM  
Some questions about lens design diagrams and a type of element
Posted By Ropuchy
Replies: 27
Views: 995
Thank you for the added input!

Maybe the cut-out is for both mounting and optical purposes? Looking inside my copy of the lens, there's a small ring with notches meant for a lens wrench, and it's around where I'd imagine that odd element to be.


And thank you for the link, I'll be sure to look at it a bit!
Forum: Pentax SLR Lens Discussion 05-22-2019, 09:45 AM  
Some questions about lens design diagrams and a type of element
Posted By Ropuchy
Replies: 27
Views: 995
For some reason your image isn't loading for me. What is it?

---------- Post added 05-22-19 at 09:50 AM ----------


Ah, alright. Thank you for all the information!

You seem to know a bit about this stuff. Do you know of any good resources on this subject that I could use to learn more about it?
Forum: Pentax SLR Lens Discussion 05-21-2019, 02:55 PM  
Some questions about lens design diagrams and a type of element
Posted By Ropuchy
Replies: 27
Views: 995
So the first two elements are creating a shrunken wide-angled image that's focused very near behind them, and the funky element along with the elements behind it act as a macro lens focused on that image?

What do you mean by "corrected for color"?

Also, how are you able to figure all of this from the diagram?


Thank you for the input!
Forum: Pentax SLR Lens Discussion 05-21-2019, 01:00 PM  
Some questions about lens design diagrams and a type of element
Posted By Ropuchy
Replies: 27
Views: 995
Ah ok, that'd make sense.
Thank you for the information on why those indents may be there! Any idea what sort of element it is?
Forum: Pentax SLR Lens Discussion 05-21-2019, 11:43 AM  
Some questions about lens design diagrams and a type of element
Posted By Ropuchy
Replies: 27
Views: 995
So the locations of the dashes themselves don't really mean anything?

The dashes are all spaced uniquely, so I thought there would be a specific purpose for their spacing and location.
Forum: Pentax SLR Lens Discussion 05-21-2019, 11:06 AM  
Pentax-A Macros
Posted By Ropuchy
Replies: 10
Views: 560
Yes, as Pentaxus said, you wouldn't use the A setting on an older manual camera. A camera like the K1000 has an arm that mechanically interfaces with the lens to determine its aperture. Setting the lens to the A setting on an older camera like that would be the same as setting it to it's minimum aperture (F22 in the case of your lens).
Forum: Pentax SLR Lens Discussion 05-21-2019, 11:01 AM  
Some questions about lens design diagrams and a type of element
Posted By Ropuchy
Replies: 27
Views: 995
Alright, so I've noticed a few things in some of the lens design diagrams in the lens reviews, and I'd like to know what they are.

I'm using the diagram of the Pentax-M 28mm F3.5 as the example because it has the things I'm unsure of. I'll attach a photo with colored circles around what I'm talking about.

On the line that runs down the center of the elements, there are several 'breaks' with small dashes in them. What are these for, if anything? They are circled in RED.

There's an oddly-shaped element in some of these wider-angled lenses. does this type of element have a name? I assume it's what allows the lens to have a focal length lesser than the flange distance, but correct me if I'm wrong. The element is circled in GREEN. I've also seen arrangements of multiple elements in other wide angle lenses that appear to have a similar purpose. Does this type of grouping have a name?


On the element circled in green, there are small indents on the top and bottom. Do these provide any optical function, or is it more of a groove to hold the element by? The indents are circled in ORANGE.

Thank you!
Forum: Pentax SLR Lens Discussion 05-21-2019, 10:39 AM  
Pentax-A Macros
Posted By Ropuchy
Replies: 10
Views: 560
Alright, good luck!

The advantage of using the A setting is that the camera is able to get a constant exposure reading, it knows what aperture it's set at.
When you have the lens set to the other aperture settings, you'll have to use the Green Button to get an exposure reading.
Forum: Pentax SLR Lens Discussion 05-21-2019, 10:23 AM  
Pentax-A Macros
Posted By Ropuchy
Replies: 10
Views: 560
A-series lenses can have their aperture controlled by the camera.
You'll need to press the button to set it to the 'A' position, and once it's set there, it'll be locked until you press the button again.
When it's in the 'A' position, you should be able to change the aperture using the controls on the camera.
When it's off the 'A' position, it acts like an M or 'K' series lens with a manual aperture.
Forum: Lens Sample Photo Archive 05-19-2019, 02:33 PM  
smc Pentax-M 50mm F2
Posted By Ropuchy
Replies: 16
Views: 5,333
Alrighty, I'll keep looking for one then! I've got a K-5, so I could probably make due with f2 if I push the ISO up, but I like to keep it low-ish.

The KP would be a great fit for the compact M series lenses I bet!


Yeah, those less common focal lengths have some charm to them. I've been looking at the K55/1.8 for that reason, probably makes a nice portrait lens on APS-C.
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