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Forum: Repairs and Warranty Service 10-03-2016, 10:19 PM  
DA 16-50 won't focus
Posted By alohadave
Replies: 8
Views: 997
I just converted my 60-250 using the instructions in this post: https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/208353-how-...ml#post2737443

It works. I was able to do it with my K-5 following the instructions.

My 16-50, not so much, now it just hunts and hunts. I need to switch it back or not try to use AF with the lens.

Edit: After further testing with the 60-250, it's not quite as fixed as I thought. When I first turn the camera on, the camera makes a hunting sound with the screw drive if the lens is wildly out of focus. Move it into focus and the SDM motor takes over, and works as it should. If the lens is already near focus, the SDM works. So if it's way out of focus, I just need to get it close and it'll work.

I consider this an improvement as the SDM never worked very well since I bought it, and I'd need to press the AF button multiple times, and try to move the focus ring to get the SDM to work at all. Somehow, the editing lens has partially fixed the SDM. Not completely, but far better than it was.
Forum: Mini-Challenges, Games, and Photo Stories 04-04-2016, 06:33 PM  
Post-Processing PP Challenge 178 - Laguna Beach LE
Posted By alohadave
Replies: 56
Views: 4,191
Here's my take on the scene.
Forum: Pentax News and Rumors 02-13-2016, 03:34 AM  
Picture of K-1
Posted By alohadave
Replies: 357
Views: 59,913
I saw that too. Hopefully that means a well thought out video system. Headphone jack would mean audio monitoring. Unless it has a built-in MP3 player! :lol:
Forum: Pentax Price Watch 10-07-2015, 02:31 PM  
D FA 100 WR - $388 shipped at B&H
Posted By alohadave
Replies: 42
Views: 4,212
I've been thinking of getting this for a few months now, lowest price I've seen, just pulled the trigger.
Forum: Post Your Photos! 04-11-2013, 08:29 PM  
Architecture Armstrong Panorama
Posted By alohadave
Replies: 5
Views: 526
Forum: Post Your Photos! 01-01-2013, 12:48 PM  
Misc My Best 12 of 2012
Posted By alohadave
Replies: 5
Views: 558
Forum: Pentax DSLR Discussion 10-14-2012, 06:30 PM  
Oh God, what is this?!
Posted By alohadave
Replies: 16
Views: 1,949
There is a difference between a hot pixel and a stuck pixel.

Hot pixels tend to show up when the sensor heats up (like during long exposures). Generally when you take shorter exposures, or wait for the camera to rest, the hot pixels will go away. They'll also be in different places on different times (different days or after some time has passed).

If the exposure is long enough to kick in the LENR, it's not unsticking anything, it's just using dark frame subtraction to edit the spots out. The next time your camera turns on, the pixel is likely to have cleared on it's own.

A stuck pixel is one that is always on, and you may or may not see it all the time, depending on the exposure and what color is surrounding the pixel in various shots, and what level of detail is near that pixel.
Forum: Flashes, Lighting, and Studio 10-14-2012, 06:04 PM  
Still having light problems
Posted By alohadave
Replies: 24
Views: 1,489
Your shutter speed will go a lot slower than 1/180 and 1/150. I'm talking about 1/4-1/15.
Forum: Flashes, Lighting, and Studio 10-14-2012, 01:08 PM  
Still having light problems
Posted By alohadave
Replies: 24
Views: 1,489
Both are dark venues. You need to use a slower shutter speed to gather more light. The lenses you are using aren't particularly fast, and that isn't helping your situation.

With slow lenses, in dark areas, without flash, you are going to have blurry shots, you have to take a lot of shots and pick ones that come out well. Shots that are at the peak of action, or in between action will tend to be better. Some blurring is not necessarily a bad thing if it shows the flow of action.

Because you'll need to bump your ISO, you'll have noise (especially on a K10D), but you can use noise reduction to help with that.

So, increase your ISO, lower your shutter speed, and take lots of shots.
Forum: Flashes, Lighting, and Studio 10-14-2012, 12:52 PM  
Still having light problems
Posted By alohadave
Replies: 24
Views: 1,489
Both are wicked under exposed. Is your flash actually firing? All I'm seeing is ambient light shots.

What mode are you shooting in? Manual, Av, Tv, Auto? Is the flash pTTL?
Forum: Post Your Photos! 10-01-2012, 03:33 PM  
Sticky: How to upload / link photos - BEGINNERS START HERE
Posted By alohadave
Replies: 191
Views: 174,668
Pixels per inch has nothing to do with web pages. It's only for printing. Stick with the pixel dimensions that you want and don't worry about what the DPI is set to.
Forum: Pentax Camera and Field Accessories 09-26-2012, 05:25 AM  
Sto-Fen Omnibounce: Are they worth it?
Posted By alohadave
Replies: 41
Views: 10,442
If you want smaller, hard light, yes. There is no better, only the effect you are trying to achieve.

The whole point of a soft box is to make the light source big, providing you with a soft light.

A snoot restricts light so that you get a small beam. Since it it smaller than a softbox, and typically used farther away than a softbox, the light is much harder.
Forum: Pentax Camera and Field Accessories 09-25-2012, 08:29 PM  
Sto-Fen Omnibounce: Are they worth it?
Posted By alohadave
Replies: 41
Views: 10,442
Directionality has nothing to do with the hardness of the light. Hardness is strictly a function of the relative size of your light source.
Forum: Pentax K-5 08-04-2012, 09:28 PM  
Stops on the K-5
Posted By alohadave
Replies: 8
Views: 1,445
I use 1/2 stops because you can't get to the flash sync speed on 1/3 stops.
Forum: Pentax K-5 08-04-2012, 06:04 PM  
Stops on the K-5
Posted By alohadave
Replies: 8
Views: 1,445
Aperture, yes.
Shutter speed, yes.
ISO, no.
Forum: Photographic Industry and Professionals 07-26-2012, 08:17 AM  
Own Newsletter
Posted By alohadave
Replies: 4
Views: 603
Write about what is important to you and what is interesting to you, not what you think a potential audience wants.
Forum: Photographic Technique 07-21-2012, 06:55 PM  
Tips for Photographing Lightning?
Posted By alohadave
Replies: 13
Views: 1,856
Nope, it's out of focus.
Forum: Post Your Photos! 07-16-2012, 08:09 AM  
People Color Run
Posted By alohadave
Replies: 4
Views: 1,434
My local mall had a 5K color run where runners got colored powder thrown on them during the run.


Color Me Rad-5k Color Run by alohadave, on Flickr


Color Me Rad-5k Color Run - Color station by alohadave, on Flickr


Color Me Rad-5k Color Run - Color station by alohadave, on Flickr


Color Me Rad-5k Color Run - Color team by alohadave, on Flickr


Color Me Rad-5k Color Run - Color Throw by alohadave, on Flickr


Color Me Rad-5k Color Run - Color Throw by alohadave, on Flickr
Forum: Photographic Industry and Professionals 07-13-2012, 04:37 PM  
theory: a ff camera is coming, but not as a dslr
Posted By alohadave
Replies: 28
Views: 2,241
People keep bringing this up, and it's not going to happen. Canon had the APS-H sensor in one of their pro cameras, and no one else has bothered to do it as well.

If you are going to increase the sensor size, it doesn't make any sense to have a custom sensor that no one else uses (especially if you are not a chip fab, like Sony). Pentax would have to pay for the sensor all by itself. With current sensors, the design costs are averaged out between all the manufacturers that purchase the design.
Forum: Pentax Medium Format 07-13-2012, 04:32 PM  
645D...shutter life?
Posted By alohadave
Replies: 21
Views: 8,628
My highest year was 13,000 shots, and I average about 8,000ish per year. If you go out shooting a lot, it adds up, even at 100-250 at a time.
Forum: Pentax Medium Format 07-13-2012, 04:29 PM  
645D...shutter life?
Posted By alohadave
Replies: 21
Views: 8,628
You don't spray and pray with MFD, 50,000 is plenty.
Forum: Pentax SLR Lens Discussion 06-26-2012, 04:03 PM  
Lens Geometry Question
Posted By alohadave
Replies: 60
Views: 3,778
Two lenses.

500mm at f/8

25mm at f/8

The 500mm lens at f/8 would have an aperture opening of 62.5mm.

The 25mm lens at f/8 would have an aperture opening of 3.125mm.

They both have the same light gathering ability, even though the aperture sizes are completely different. That is why you don't compare the physical aperture measurement. You reference the ratio, and the ratio tells you the light gathering.
Forum: Pentax SLR Lens Discussion 06-25-2012, 02:45 PM  
Lens Geometry Question
Posted By alohadave
Replies: 60
Views: 3,778
The physical size of the aperture doesn't matter when comparing two different lenses.

The f/stop number is a ratio of the focal length/diameter of the aperture opening.

f/1.8 on an 8.5mm lens is the same ratio as f1.8 on a 50mm lens. The physical openings are different sizes because the focal lengths are different.

They both have the same light gathering ability at the same f/stops (at the aperture, the size of the lens elements has some impact).
Forum: Pentax SLR Lens Discussion 06-24-2012, 10:27 PM  
Lens Geometry Question
Posted By alohadave
Replies: 60
Views: 3,778
Lenses designed for APS-C, aren't necessarily any smaller than lenses designed for 35mm Full Frame.

The mount and registration distance are the same for Pentax, so that gives you characteristics that don't really lend themselves to making smaller lenses. Ever seen a Sigma lens? They make APS-C lenses, and they are massive compared to other lens brands
Forum: Flashes, Lighting, and Studio 06-20-2012, 08:42 PM  
Hot Shoe Cover
Posted By alohadave
Replies: 15
Views: 1,745
It will have no impact. Shorting the contacts won't hurt anything. If it was a problem, then the cover would be permanent, and not something you could lose.
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