Forgot Password
Pentax Camera Forums Home
 

Showing results 1 to 25 of 300 Search:
Forum: General Photography 1 Day Ago  
The worst of Craigslist/Shopgoodwill/eBay etc.
Posted By Just1MoreDave
Replies: 135
Views: 4,127
I'll sell you an Auto Rikenon 55/1.4 for $50, and if you like, throw in some worthless random camera gear too.
Forum: Pentax SLR Lens Discussion 1 Day Ago  
Vintage (Revuenon 55mm f1.2) vs modern (DA* 55mm f1.4 SDM)
Posted By Just1MoreDave
Replies: 7
Views: 389
I have a Cosina 55mm f1.2 - I can never remember which other 55mm f1.2s are related to this. It looks kind of like the Revuenon. Anyway, it has some coma which I think makes it harder to manually focus. It also does not have any click stops on the aperture ring between wide open and f2. I sometimes want f1.4 or f1.7, and I just have to guess. For portraits, I prefer the DA* 55mm f1.4 by far, even if I manually focus the DA*. It is much easier to see the focus transition when I'm using the DA*. The Cosina is somewhat less bulky but they both use a 58mm filter. The Cosina minimum focus distance is a few mm more. The Cosina is usable, but I'd be following DA* prices really close to find a deal.
Forum: Troubleshooting and Beginner Help 3 Days Ago  
DA 35 Significantly Overexposes Shots
Posted By Just1MoreDave
Replies: 12
Views: 536
The aperture blades have to snap closed when the lever is released. When the lens is mounted, the lever keeps the lens wide open for a bright viewfinder and focusing. To take the shot, the camera moves its aperture arm to the f stop you choose to shoot at, before opening the shutter. The spring-loaded lever in the lens is supposed to follow along, so the blades can move into the correct position. All that should happen as quickly as possible - anything longer than a tenth of a second is too long.



No. Metering is sort of like a companion's advice. You have three companions, matrix, center-weighted and spot. No one is right all the time. Each has different biases. The K-r is I think the last camera with 16-segment metering, so there's room for it to be better. Matrix is also trying to guess what kind of picture you want and tip its results to that type of photo. You have to listen to the advice and then decide if it's good enough. You seem to already know how matrix will advise you, so more advice won't really help. We'd all like perfect advice, but it's not quite there yet.

Spot is weird, because he only cares about one point in the center, and the advice is just for that spot.
Forum: Troubleshooting and Beginner Help 10-08-2018, 07:45 AM  
Problem with removing top cover on spotmatic
Posted By Just1MoreDave
Replies: 4
Views: 232
My first thought is it's a left hand thread.
Forum: Troubleshooting and Beginner Help 10-03-2018, 08:41 PM  
Shake Reduction on a Pentax K5 IIs
Posted By Just1MoreDave
Replies: 9
Views: 554
The manual says SR can't be set when using Bulb mode, the 2 or 12 second timer, the IR remote, mirror lockup or wireless flash. Also when Auto Align is set to Off in HDR Capture.

You need to set the aperture ring use to Permitted for manual focus lenses or any time you are shooting with the aperture ring off of A.

SR also needs to know the focal length to work, so if the camera hasn't asked you to input a focal length for a manual focus lens, it won't activate SR. Turning the camera off and on again should bring up the focal length input screen.
Forum: Pentax SLR Lens Discussion 10-01-2018, 10:59 AM  
Late to the 40mm XS party
Posted By Just1MoreDave
Replies: 17
Views: 694
I am resisting this lens! I recently got the DA 21 and DA 70. Now I understand why people get the whole set.

(It's easier to resist the DA 15. I know it's wonderful but my composition skills are not up to that width.)
Forum: Troubleshooting and Beginner Help 09-30-2018, 06:40 PM  
Lens compatibility from a zx50 to a k3
Posted By Just1MoreDave
Replies: 14
Views: 430
You probably will see package deals with a WR lens in the deal, one of the ones other people mentioned. It's nice to have at least one WR lens for a little extra piece of mind, and it my work out better to buy it with the camera.
Forum: General Photography 09-29-2018, 02:19 PM  
Pre-emptive seller's remorse
Posted By Just1MoreDave
Replies: 31
Views: 1,203
I had regret listing my Super-Takumar 85mm f1.9 for sale. Then there were no buyers. So now I have additional regret that it didn't sell.
Forum: Pentax SLR Lens Discussion 09-27-2018, 07:39 PM  
Are the Pentax 135mm K f2.5 and Takumar 135mm f2.5 6 element lenses =?
Posted By Just1MoreDave
Replies: 9
Views: 720
The weight is different too. The extra glass element makes the 6 element version significantly heavier. The distance scale has different markings and there's a different part number stamped on the camera side of the A/M switch.

The K-mount versions look so different that once you've seen them, you wouldn't mix them up.
Forum: General Photography 09-26-2018, 07:18 PM  
Recommendations for landscape photography locations West Denver area
Posted By Just1MoreDave
Replies: 11
Views: 444
I like Roxborough State Park, easy to combine with Red Rocks, south of 470.

The Great American Beer Festival was last weekend so nearly any brewery has special release beer.
Forum: Pentax SLR Lens Discussion 09-25-2018, 09:09 PM  
Pentax-M 40mm f2.8 focus ring
Posted By Just1MoreDave
Replies: 8
Views: 363
I found it and removed the rubber grip without damage. (It looks like if anyone else has this problem, they could cut one row of blocks from the grip from an M50/2 or any 49mm filter M lens and it would work.) I'll try some solvents on the glue remnants tomorrow.
Forum: Pentax SLR Lens Discussion 09-25-2018, 07:09 PM  
Pentax-M 40mm f2.8 focus ring
Posted By Just1MoreDave
Replies: 8
Views: 363
I have a parts lens somewhere which should have a focus ring. PM me if you want it and I'll see if I can remember what drawer it's in.
Forum: Photo Critique 09-24-2018, 09:40 PM  
Still Life hammers
Posted By Just1MoreDave
Replies: 10
Views: 467
It reminds me of the Lee Valley catalog cover photos. Same subject, different approach. Maybe this gives you an idea?

- Lee Valley Tools
Forum: General Talk 09-24-2018, 09:22 PM  
Gearheads, Unite!
Posted By Just1MoreDave
Replies: 2,007
Views: 163,594
The Supra looks like it'll be tiny in modern terms, but slightly longer than the 77 Celica - 1.5 inches longer wheelbase using Paul's number. Although the Celica is shorter and probably narrower, it had a back seat, while the Supra won't. Wikipedia says 94.75" wheelbase for the Celica and 101.2" for the BRZ/FRS. Everyone was smaller in 1977.

The Supra will have torque, which would be nice.

The BRZ/FRS is a decent starting point in a modern car. I see used ones with higher mileage for $10-11K. Assuming those are not previously wrecked, they would be candidates for replacing all the suspension stuff, refreshing the engine, modifying to personal taste, still less than a tenth of a Bentley Continental GT. :)
Forum: Troubleshooting and Beginner Help 09-22-2018, 07:27 PM  
how to clean a takumar 135mm F2.5 M42 6 element
Posted By Just1MoreDave
Replies: 4
Views: 317
All of the Takumar 135/2.5s have a threaded barrel, so you can unscrew the whole barrel in front of the focus ring. Just grab on to the focus ring and the front barrel, and twist. That is all the elements between filter ring and aperture. I have never taken apart that barrel any further, but you may find that it's easier to get to elements after it's unscrewed.
Forum: Pentax SLR Lens Discussion 09-21-2018, 08:03 PM  
Which 3rd party PK lenses you treasure the most?
Posted By Just1MoreDave
Replies: 74
Views: 2,426
Their Vivitar 135/2.8 is pretty good, and their 200/3.5 is too. These are generally cheap, like $25, especially in M42 mount. Vivitar sold Tokina-made versions of these two, which I haven't used but are supposed to also be good. I believe Komine made the 135/2.8 Close-Focus, a 1:2 macro lens similar in style to your 55/2.8.

I did buy a Komine-made Vivitar 24mm f2.0 with a KA mount. The Kiron version is really good. The Komine has a lot of coma so it's not sharp at all wide open, which makes focusing challenging. I have the Sigma Superwide II 24/2.8 which is very sharp so the Komine just takes Christmas light photos, where coma is fun.
Forum: General Talk 09-20-2018, 09:01 PM  
Gearheads, Unite!
Posted By Just1MoreDave
Replies: 2,007
Views: 163,594
Excellent idea!

After squinting at the camouflage photos, the Supra looks better too.
Forum: Pentax SLR Lens Discussion 09-20-2018, 08:22 PM  
emulsive.org 40 to 55mm Pentax Prime Comparo
Posted By Just1MoreDave
Replies: 9
Views: 466
Seven blades.
Forum: Pentax SLR Lens Discussion 09-15-2018, 07:34 PM  
Limiting the Widest Aperture on K Mount?
Posted By Just1MoreDave
Replies: 21
Views: 881
The easiest way to temporarily test your theory is to unmount the lens a little. Mount the lens, set the aperture ring to f22, press the locking button and unmount the lens slowly until you see the aperture blades close fully. Now you can control the aperture with the ring. Most lenses are still attached OK like this, but it's obviously a little risky. You can drill a second mounting position into the mount, so the lens locks this way. The mount is probably plated brass and not too hard to work with.

You can remove the aperture lever on this lens but it looks like work. You'd remove the mount and the light shield around the rear element. Then you can see a single screw that the lever pivots on. There's also a spring for the return action, remove that. Obviously cutting or damaging the lever permanently is completely unconscionable.
Forum: Pentax SLR Lens Discussion 09-14-2018, 02:31 PM  
K300/4 Tripod mount, quick version
Posted By Just1MoreDave
Replies: 4
Views: 387
That's why the lens looks deliberately designed to not take a mount. There's a 7.5mm space for this ring to attach, fortunately with some machined grooves to grip the ring. The ring has plastic inside to assist grip and prevent damage. It seems well designed and secure enough on the lens to me. The ring is twice as wide so there is a gap. The other places to attach a mount are the aperture ring or DOF scale, which I think are thinner metal, and all different diameters so you'd need different rings. I agree that it's not ideal, I just think that's as good as this lens allows.

I forgot about mounting the camera. That does help. :)
Forum: Pentax SLR Lens Discussion 09-14-2018, 11:00 AM  
K300/4 Tripod mount, quick version
Posted By Just1MoreDave
Replies: 4
Views: 387
Recently someone mentioned the DSLRKit Tripod Mount A009 was only $20 on Amazon, and specs suggested this would work on my K300/4. So I gave it a shot and it works. The K300/4 seems to be deliberately designed so it can't take a mount, with possibly the widest aperture ring on any lens right where an attachment would go. The white lens alignment button is in the way of the remaining area. I used to think I'd make my own, then I looked at knockoffs meant for other telephotos, but never did. For this one to fit, I had to pry out the white button - it's just glued in. I think you could avoid that by modifying the ring but that's work. Anyway, the ring goes right on after removing the button. As you can see, the lens is still front-heavy. The base of the foot has a couple of hex screws and could be swapped for a longer part to fix that. The ring is lined inside with plastic so it doesn't damage the lens.

IMGC3158 by Dave, on Flickr
Forum: General Talk 09-14-2018, 10:25 AM  
Adorama untangles the knot - customer service win
Posted By Just1MoreDave
Replies: 5
Views: 392
The used DA50 was only $69 plus $3.50 to ship to Connecticut, which I thought was a great deal. The broken DA 18-55 was his original version 1, from a *ist DL that he bought new, now dead. He uses it on a K-r and is perfectly happy. So I sent him my 18-55 version 1 from my old DS. It worked out as if I sold that lens for $40, after all the lost shipping costs. I should feel bad about that. :)
Forum: General Talk 09-13-2018, 07:43 PM  
Adorama untangles the knot - customer service win
Posted By Just1MoreDave
Replies: 5
Views: 392
My brother had a birthday coming up, and convinced my mom that the only present he wanted was to replace a lens he had dropped and broken. He says "just ask Dave, he knows." So she asks, and I say I'll take care of it. I ask my brother if he dropped the Pentax-F 50/1.7 that I gave him. Yes, he replies. OK, the sensible replacement is a DA 50/1.8 because it's easier to find. Adorama has one used for $69 that looks good, and a great return policy if it's not good. I can order the lens and have it shipped to my mom, 1800 miles away, so she can give it to my brother. A couple of minutes online, Mom thinks I'm a hero, Adorama ships the lens in time for the birthday, time for a beer!

So then I hear from my mom that there is a problem, which my brother will explain. He eventually admits that the broken lens was not an F50/1.7, it was a DA 18-55. I would like to say that he has a communications degree and a job where he uses those skills all day. But to the point of the story, he had to call Adorama, I had to send him some paperwork, he had to ship the lens back to Adorama, and I got the credit on my card with no fuss. I was impressed because I bought it, it was sent to my mom, my brother returned it and it all worked out. Three Adorama employees at least helped out along the way.

Still stuck with the brother, though. :)
Forum: General Photography 09-12-2018, 12:49 PM  
Some questions regarding buy/sell etiquette
Posted By Just1MoreDave
Replies: 55
Views: 1,683
It's a great way to hurt sales. Yes, it takes a little time to take the shots and post them, but it proves you have the item, shows way more about its condition than words can, and appeals to window shoppers. More than once I've browsed the marketplace, seen an interesting title, looked at the pretty photos and been tempted to buy. No pictures is a negative.
Forum: Pentax SLR Lens Discussion 09-11-2018, 09:48 PM  
SMC Pentax-M Stiff, Very STIFF Aperture Ring
Posted By Just1MoreDave
Replies: 4
Views: 318
Usually for the M series, when the mount is off, you can then pull the aperture ring off. But don't do that yet. There is a ball bearing trapped between the ring and the lens body. Usually for the M series, it's where the orange diamond focusing mark is. A spring in the lens body is pushing it against teeth in the aperture ring's inner surface. You can slide the aperture ring off inside a bag so the ball bearing doesn't shoot off into space. They are tough to find after that.

Once you get the ring off, clean up the old dried grease and possibly grit on the ring and lens body. Also the recess for the ball bearing. You don't need to add very much grease back to the ring to get it to work. If you want a lens for video, don't reinstall the bearing, so you can change apertures without a click. Reassemble and it should be fine for another few decades.
Search took 0.03 seconds | Showing results 1 to 25 of 300

 
Forum Jump


All times are GMT -7. The time now is 11:48 AM. | 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