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Forum: Pentax DSLR Discussion 4 Days Ago  
The K20D Club
Posted By audiobomber
Replies: 470
Views: 64,305
I went from a K100D Super to a K20D and I agree, it was major.

I've since owned a K-x, K-01 and K-5. I currently own a K-3 and still use the K20D. All the rest are gone. That's because the K20D is a better camera than all the others IMO, though not as good as my K-3.
Forum: Pentax SLR Lens Discussion 5 Days Ago  
the limiteds do they live up to the reputation and why
Posted By audiobomber
Replies: 232
Views: 18,355
The FA 35mm is actually sharper than the DA 35 macro:

http://www.opticallimits.com/images/8Reviews/lenses/pentax_35_2/mtf.gif

http://www.opticallimits.com/images/8Reviews/lenses/pentax_35_28/mtf.gif

The main reason I chose the FA 35 was the extra stop. For close focus I can just pop a Raynox 250 on the end of the FA 35 (or better yet, use my DFA 100mm). To get 1:1 focus on a DA 35mm, you almost have to be touching your subject with the lens.
Forum: Pentax SLR Lens Discussion 08-31-2018, 06:40 PM  
the limiteds do they live up to the reputation and why
Posted By audiobomber
Replies: 232
Views: 18,355
I had both as well and there was one photographically significant difference. The XS has double the CA of the Limited, as shown at DXOMark and referenced in the PF review. The CA was too much for me and was not removed easily in post. Also, I always use a hood to minimize flare, and that more than negates the XS size advantage. Sure, the lens is somewhat resistant to flare, but the difference between ther Limited with hood and bare XS was clearly visible, even indoors.
Forum: General Talk 08-30-2018, 09:56 PM  
The Joke Thread
Posted By audiobomber
Replies: 1,164
Views: 89,047
Good one bigdavephoto. I'm going to borrow some of your prose.

Jesus and Moses were playing a round of golf. On the first tee, Jesus swings. The ball flies down the fairway about 100 yards. A squirrel came running out of the bushes, picked the ball up in it's mouth, and started to run down the fairway. About half way down the fairway, an eagle flew down and grabbed the squirrel and took off. About the time the eagle reached the green, a bolt of lighting flashed out of the clear blue sky and scared the eagle causing the eagle to drop the squirrel. The squirrel hit the ground with the ball still in it's mouth. The squirrel got up, ran across the green and dropped the ball into the hole.

Moses says "JESUS CHRIST, ARE YOU GOING TO F*** AROUND OR PLAY GOLF?

---------- Post added 2018-08-31 at 01:17 ----------

In a similar vein...

A man fan dies and goes to heaven. St. Peter, knowing the man is a huge fan of rock music, asks if he would like to see heaven's band. Of course the man eagerly agrees. The band consists of Keith Moon and John Bonham on drums, Jack Bruce and John Paul Jones on bass Jimi Hendrix, Duane Allman and Eric Clapton on guitar, Greg Allman and Billy Preston on organ and vocals. As he's watching this amazing lineup, he says to St. Peter, "This is awesome, but I didn't know that Eric Clapton was dead."
St. Peter says "Oh he's not. That's just God. He thinks he's Eric Clapton."
Forum: Photographic Technique 08-14-2018, 10:43 AM  
Focus help with K-3 birds in flight
Posted By audiobomber
Replies: 44
Views: 4,563
I can't agree with AF-S for birds in flight. May work fine if the bird is flying horizontally. If it is flying toward you, by the time you focus and get the shot off, the head will likely be out of the focal plane. You're much better off with AF-C and expanded area, let the camera assist with
tracking.

https://www.pentaxforums.com/forums/26-mini-challenges-games-photo-stories/6...ml#post4400157
Forum: Mini-Challenges, Games, and Photo Stories 08-07-2018, 06:46 AM  
BIF Photography
Posted By audiobomber
Replies: 1,131
Views: 116,321
Trumpeter swan K33 made three passes at a pool before landing. I got about 60 well-focussed BIF's. (K-3 and DA 55-300mm PLM).
Forum: Photographic Technique 07-29-2018, 02:58 PM  
Focus help with K-3 birds in flight
Posted By audiobomber
Replies: 44
Views: 4,563
I don't see that fewer AF points should matter. When using extended area AF, initial acquisition is concentrated on the specified point only. The outer points are not in play.

I do use the 9-point array, expanded area AF for sports, where the target is not moving so quickly. With a BIF however, I can not keep the bird in the center, so the outermost points are best kept in play.
Forum: Pentax SLR Lens Discussion 07-17-2018, 08:22 PM  
the limiteds do they live up to the reputation and why
Posted By audiobomber
Replies: 232
Views: 18,355
I was doing that, now I use a generic 40.5mm pinch cap. I was concerned that constantly pushing the film cap in and out might wear the paint over time.
Forum: Pentax SLR Lens Discussion 06-26-2018, 11:22 AM  
the limiteds do they live up to the reputation and why
Posted By audiobomber
Replies: 232
Views: 18,355
The K-3 is about as good as it gets for DXOMark APS-C lens scores. There are three things that affect DXOMark sharpness scores:
  • Sensor size (larger sensors score higher, all else being equal)

  • Number of pixels (more pixels = higher resolution, all else being equal)

  • Anti-aliasing (blur) filter. The stronger the blur filter, the lower the sharpness score, all else being equal.


The Overall Score is an unknown combination of measurements. I consider the Overall Score to be DXO's opinion on desirability of a lens, when used on the specified camera. It is a coarse and questionable measure. Even the other scores (sharpness, vignetting, etc) are limited in usefulness. The graphs are much more informative.

Note that DXO does not consider lens rendering or bokeh. What they do provide is useful, but certainly not the final authority on what lens to choose.
Forum: Photographic Technique 06-24-2018, 06:06 AM  
Focus help with K-3 birds in flight
Posted By audiobomber
Replies: 44
Views: 4,563
A bit more explanation is warranted here.

When you half-press the shutter in Expanded Area AF-C mode, the camera tries to find focus on the central point. As soon as focus is confirmed, you need to take the shot. If you don't take the shot, the camera assumes that it has selected the wrong target, and starts to search adjacent points. When you take the shot, the camera records the shape and colour of the object in focus and begins tracking. It tracks until you let up on the shutter button.

If you have accidentally focussed on something other than the subject, say a cloud in the background, that is what the camera will track. If this happens, you need to stop and restart tracking by letting up and re-depressing the shutter button. This is called focus bumping. Sometimes the camera loses focus during a sequence. This again calls for focus bumping. IME, the K-3 is very good at tracking with the settings I listed above, and given a fast focussing lens like the DA*300 or 55-300mm PLM. Tracking a BIF with the older 55-300mm lenses is possible, but you will have a lot more missed opportunities.

https://www.pentaxforums.com/forums/38-photographic-technique/332226-focus-h...ml#post3806571
Forum: General Talk 06-23-2018, 06:10 AM  
The Joke Thread
Posted By audiobomber
Replies: 1,164
Views: 89,047
A farmer and his wife were watching their herd of cattle.

Farmer's wife: Why can't you be more like that bull? He makes love 365 days a year.

Farmer: With the same cow?
Forum: Pentax KP 04-12-2018, 07:32 PM  
KP size compared to Olympus?
Posted By audiobomber
Replies: 51
Views: 4,850
I have no trouble at all holding my K-3 with one hand, thoughI do like the tilt LCD on my a6000.
Forum: Video and Pentax HDSLRs 03-22-2018, 11:38 AM  
Mirrorless 4k video option for Pentax lenses
Posted By audiobomber
Replies: 124
Views: 9,517
I have four NEX to PK adapters. All support auto ISO, exposure compensation and focus peaking on my a6000 and I can move the AF point all over the frame. The only difference between shooting with a Pentax lens and a Sony is that I don't have AF and electronic aperture control.
Forum: General Talk 03-10-2018, 07:58 PM  
Favorite movie "scene"
Posted By audiobomber
Replies: 218
Views: 13,636
Can any movie do justice to a book? How long does it take to read a book? How long does it take to watch a movie?

Catch-22 was a mindbender. I loved it, along with novels I consider to be similar; Slaughterhouse 5, Mash and not on topic, but similar in style, Catcher In The Rye.
Forum: Video and Pentax HDSLRs 03-05-2018, 08:11 AM  
Mirrorless 4k video option for Pentax lenses
Posted By audiobomber
Replies: 124
Views: 9,517
The reviewer is correct, the m4/3-PK version can only control aperture using the aperture ring on the lens. If your lens has no aperture ring, it remains fully closed.

He's not too clear on crop factor, but it's not hard to determine. The focal reducer is .72X, so that is how it impacts both focal length and aperture. A 50mm f1.4 on FF becomes 100mm f2.8 equivalent on m4/3, and 72mm f2.0 equivalent with the Roxsen on a m4/3 camera.

He's a bit too generous regarding impact on IQ, the extra glass does increase aberrations (flare, CA, field curvature, distortion, coma). Whether this bothers you depends how fussy you are, and on the lens being used. Veiling flare especially becomes much more likely. Use a good lens and a hood at all times. I don't shoot video, but I believe it is far less demanding regarding sharpness and aberrations compared to stills shooting, so that may explain his views on IQ with the Roxsen.
Forum: Video and Pentax HDSLRs 02-18-2018, 10:34 PM  
Mirrorless 4k video option for Pentax lenses
Posted By audiobomber
Replies: 124
Views: 9,517
Theoretically, you should gain .72 stops with the RJ Turbo, but in practice I get only 1/2 stop.
Forum: Pentax SLR Lens Discussion 02-15-2018, 10:15 AM  
Teleconverter challenge Sigma vs Kenko vs Tamron X1.4
Posted By audiobomber
Replies: 54
Views: 7,950
I have the same Kenko, as well as the Pentax 1.4X. The Pentax TC is slightly superior in IQ but radically better for auto-focus with in-lens motors.
Forum: Pentax KP 02-14-2018, 07:28 AM  
KP size compared to Olympus?
Posted By audiobomber
Replies: 51
Views: 4,850
I hope the trend does not continue. I'd much rather pull out a remote than play around with an app and phone.
Forum: Pentax SLR Lens Discussion 02-13-2018, 02:40 PM  
Teleconverter challenge Sigma vs Kenko vs Tamron X1.4
Posted By audiobomber
Replies: 54
Views: 7,950
IQ is very good and it is FF compatible. AF is good with screwdrive lenses but not with in-lens motors.

Why do you want a TC with attendant IQ and AF compromises vs. shooting in crop mode?
Forum: Pentax KP 02-13-2018, 06:35 AM  
KP size compared to Olympus?
Posted By audiobomber
Replies: 51
Views: 4,850
Are you saying the KP does not allow IR remote shutter release? That would be difficult to believe because even my old K100D Super had that capability.

I have a Sony a6000 for its small size, but it cannot replace my K-3, it is a supplement only.
Forum: Pentax SLR Lens Discussion 02-12-2018, 10:00 PM  
Teleconverter challenge Sigma vs Kenko vs Tamron X1.4
Posted By audiobomber
Replies: 54
Views: 7,950
IME. a 2X TC is not viable if you care about IQ.

Don't use a TC with the K-1. You will get better AF and better image quality if you shoot in crop mode vs. using a TC.

For maximum range, use the K-1 in crop mode with a Pentax HD 1.4X RC.
Forum: Video and Pentax HDSLRs 02-11-2018, 11:04 PM  
Mirrorless 4k video option for Pentax lenses
Posted By audiobomber
Replies: 124
Views: 9,517
I don't know exactly what you are referring to, but the RJ Camera focal reducer seems pretty good for the price according to this review: joe12south | Comparing Focal Adapters: The Metabones Speed Booster vs the RJ Photo Lens Turbo
Forum: Pentax KP 02-08-2018, 11:32 AM  
KP size compared to Olympus?
Posted By audiobomber
Replies: 51
Views: 4,850
EM-1 and EM-10 are quite different in size. Compare camera dimensions side by side



Grip is hugely important to me. I wanted a small camera to go along with my K-3. I went to the shop intending to pick up an RX100, but it was uncomfortably tiny. I tried an OMD EM-10 next and quickly rejected it because it had no grip. Without a grip, you need to pinch the camera in your fingers constantly, or it will slip out of your hand. Even with a small camera this gets very tiring. There's no excuse for this IMO, even my small Canon A720 p&s and my Q7 had decent grips. I ended up buying an a6000.
Forum: Site Suggestions and Help 02-01-2018, 08:14 AM  
Question Lens search incomplete
Posted By audiobomber
Replies: 1
Views: 222
I was researching K-mount 135mm lens options, and I noticed that most third-party lenses listed in the PF lens database were missed. It appears the search only pulled up lenses that are in production, even though I specified both.

Here's the search: <= F3.4 Third Party Prime Lenses between 126mm and 141mm | PentaxForums.com
Forum: Video and Pentax HDSLRs 01-30-2018, 07:18 PM  
Mirrorless 4k video option for Pentax lenses
Posted By audiobomber
Replies: 124
Views: 9,517
Yeah, identical. It's a very well crafted piece, fits tight in both mounts and doesn't have the Zhongyi's protruding element that impacts some lenses.

RJ camera is the manufacturer: "Hi, This is R.J. We ve been making and selling just about any accessories you may need for your digital cameras and film cameras. Lens hood, lens adapter tubes, tripods, camera bags, lens caps, batteries, you name it."

Roxsen is a reseller: "Roxsen Digital, a professional camera accessories' seller and wholesaler."
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