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Forum: General Photography 10-30-2017, 02:23 PM  
Why 70-200mm and not wider but shorter?
Posted By fredralphfred
Replies: 29
Views: 1,171
I seem to remember reading somewhere (can't quite remember) that Ansel Adams thought that magic ratio was about 1.4. This makes the Pentax Limiteds (15, 21, (x1.5)31, 43, (x1.25, da*)55, 77) a pretty magic set for APS-C users as most of those numbers are "spot-on" (if you agree with Mr. Adams). If you really want, I can look in some of his photo books to see if I can find the quote, but that just reminds me that I've got to get Joss Whedon's Firefly back to him.

---------- Post added 10-30-17 at 04:30 PM ----------

As many of you might have guessed (if you surmised at all), I've done little useful photographic work. My pictures are mainly crap. But the brief months I spent working for a small newspaper drilled into my head why photojournalists carry a 24-70. (Of course, it was a poor paper, so I used my Pentax with the 18-55. f/2.8 would have been nicer.) For indoor events (of almost any kind) there's just about nothing better. For sports, that 70-200 gets you almost any indoor sport you might want. I've never done a wedding (or a weeding) but I can imagine it would be about similar to covering a basketball game (if you were quieter & more careful).

I photographed an indoor trade show a couple of months ago (unfortunately, I took the LX-100 because I didn't know they wanted me to photograph it)
and an enthusiast who had a day job as a portrait photographer showed up. He complained to me about his lens choice -- he brought his 70-200 & a
15-30 or something similar (Canon). I understood exactly where he was coming from. However, I looked at the photos on his web site, and he was talented -- he certainly got some nice shots with that combo, it just made his job harder.
Forum: Pentax News and Rumors 10-29-2017, 11:54 AM  
HD Pentax-DA★ 11-18mm f/2.8
Posted By fredralphfred
Replies: 474
Views: 41,339
Just over at First look at upcoming Pentax 'star series' lenses and silver edition K-1: Digital Photography Review -- they claim the switch "appears to be for optical image stabilization." Perhaps Pentax is planning to remove IBIS switches from future bodies so it has to be controlled on the lens!
Forum: Pentax News and Rumors 10-26-2017, 09:12 AM  
HD Pentax-DA★ 11-18mm f/2.8
Posted By fredralphfred
Replies: 474
Views: 41,339
You know the thing that frustrates me? Ever since I purchased my first DSLR in 2008, I've tried to make pictures as good as I imagined them in my head, but my gear keeps getting in the way! All I need is a Limited zoom 9-30mm f/1.2 that's about the size and weight of my DA 15, and I could make those photos! PENTAX, YOUR GEAR IS GETTING IN MY WAY! I'm going to have to look at alternatives now.
Forum: Digital Processing, Software, and Printing 10-26-2017, 02:53 AM  
DXO acquires Nik Collection from Google
Posted By fredralphfred
Replies: 26
Views: 1,396
I think he is assuming the free (or possibly non-DXO) versions are going away.
Forum: Pentax SLR Lens Discussion 10-26-2017, 12:58 AM  
Looking for advise for lens filters
Posted By fredralphfred
Replies: 14
Views: 524
It also makes light fandangos extremely hard to see.
Forum: Pentax SLR Lens Discussion 10-25-2017, 06:49 AM  
Low-light focusing: Why are some lenses better?
Posted By fredralphfred
Replies: 27
Views: 1,213
I want to let everyone know that I find this discussion fascinating -- many things I hadn't considered, and many plausible explanations for the so-called low-light blues. Especially the anecdotal factor -- people's experiences vary. What does one word really mean to two different people?
Forum: Pentax SLR Lens Discussion 10-23-2017, 01:01 PM  
Low-light focusing: Why are some lenses better?
Posted By fredralphfred
Replies: 27
Views: 1,213
I've been reading reviews of the Tamron 17-50 vs. Sigma 17-50 & Pentax 16-50. One of the big complaints I read about the Tamron is that it has "trouble" focusing in low light. If they're all the same aperture (f/2.8), why would one lens focus "better" in low light than the others? Could this just be people's impression of the Tamron because of its relative cheapness, or is there something specific that would cause one lens to outperform another for focusing in low light?

Also, do these problems disappear when using contrast-detect (live view)?

I'd really love some sort of science-based explanation.
Forum: Photographic Technique 10-21-2017, 04:12 AM  
Front focus and back focus problems with manual focus lenses
Posted By fredralphfred
Replies: 17
Views: 1,066
That's just as well. I've put aftermarket screens in two Pentax DSLR's, only to find that they needed shims to correct the distance which are almost impossible to find. (One of my major irritations of Pentax is that you can use all this legacy glass but they don't make focusing screens to support it.)He means that a lens (especially an old or cheap one) will focus "differently" when turning clockwise vs. counter-clockwise (left-to-right is different than right-to-left) because of wear and/or sloppy manufacturing.
Forum: Pentax K-1 10-12-2017, 10:36 AM  
Fro...such a helpless dork...
Posted By fredralphfred
Replies: 17
Views: 1,203
I don't think he was demeaning the K-1. It seemed to me like he was mocking DxO for putting a camera in their top-10 based on something other than popularity. I've watched several of his shows and he doesn't seem to have an anti-Pentax bias.

But why should he try the K-1? He's got lots of Nikon and Canon glass, and he's happy with their cameras. Just because I prefer the ergonomics and lens line-up of Pentax doesn't mean everyone does. Not everyone wants to shoot with a compact bag of Limited primes.
Forum: Pentax News and Rumors 10-11-2017, 10:25 PM  
DxO score for Pentax 645Z: 101!
Posted By fredralphfred
Replies: 123
Views: 9,886
If anything, more MF models (compact or not) would mean more sensor availability. Where does everyone else get their sensor? Most manufacturers that make sensors (even if they also make cameras) sell the sensors separately because it's so expensive to develop them. And I think that Pentax has a much better chance than most for the same reason I liked the K-mount system when I purchased my first SLR in 2008 -- a well-established line of lenses and excellent compatibility with vintage glass. Plus, as many folks have mentioned with other mirrorless systems, much of the size advantage goes away when you get away from "normal" focal lengths because they can't make the lenses any smaller. Not to mention that MF glass is bigger to begin with.

I think Pentax's chances to sell mirror-based systems are better in MF because shooters there are more likely to employ tripods than 35mm format shooters. Also, the 645z just looks more impressive to many non-camera-savvy customers than the Hasselblad or Fuji bodies.
Forum: Pentax Film SLR Discussion 10-11-2017, 05:15 PM  
d fa 70-200 film body?
Posted By fredralphfred
Replies: 10
Views: 653
That was my understanding -- as far as flash exposure goes, P-TTL was more of a "work-around" than anything else. Not that any other camera company did it any differently. Whatever else P-TTL does (I'm guessing optical remote flash control?) would probably have been possible to add on to TTL if they didn't have to replace it in the first place.
Forum: Pentax K-1 10-11-2017, 12:25 PM  
Fro...such a helpless dork...
Posted By fredralphfred
Replies: 17
Views: 1,203
I should watch him more often. I find him amusing. Thanks for the link.
Forum: Pentax SLR Lens Discussion 10-09-2017, 07:21 PM  
HD lens coating -- bad name?
Posted By fredralphfred
Replies: 27
Views: 1,009
Plus it works with Pentax being a tough, weather-sealed, cold-capable system.
Forum: Pentax DSLR Discussion 10-09-2017, 07:19 PM  
The K20 lives!
Posted By fredralphfred
Replies: 12
Views: 840
How much usable (necessary?) focus range does that typically take off a lens?
Forum: General Photography 10-09-2017, 04:13 PM  
Great read! About Camera Hype..
Posted By fredralphfred
Replies: 24
Views: 1,124
I think they will continue to develop Thetas as long as they're successful, and that's great! This won't take resources away from other successful camera lines. The Theta's success will not, I believe, take away from the 645 digital, FF, or APS-C lines as long as they are successful in their own right. The profit-per-sale has the potential to be much higher on the higher ticket items. Ultimately how much money will they be able to get for a Theta vs. a 645Z? Also, there's a certain amount of prestige involved for Ricoh/Pentax in making the higher-ticket cameras.

Don't forget that one of the appeals of the Theta is that it is associated with a "real" camera company (which impresses many who know no better). Cross-pollination is also possible, with ideas and technologies moving either way. This can only help both lines.
Forum: Pentax DSLR Discussion 10-09-2017, 02:47 PM  
The K20 lives!
Posted By fredralphfred
Replies: 12
Views: 840
Wow. I didn't even know people did that. I thought "cage training" was cruel. But I don't have a dog -- I'm not an "animal lover," so most of this doesn't apply to me anyway.

---------- Post added 10-09-17 at 04:50 PM ----------

Why black-and-white, per se?
Forum: Pentax SLR Lens Discussion 10-09-2017, 02:33 PM  
HD lens coating -- bad name?
Posted By fredralphfred
Replies: 27
Views: 1,009
That's an interesting take on it I hadn't considered.
Forum: Pentax SLR Lens Discussion 10-09-2017, 03:43 AM  
HD lens coating -- bad name?
Posted By fredralphfred
Replies: 27
Views: 1,009
I could actually go for that. Naming things after Fred amuses me, like this: Fred Paris. They actually take that seriously. I'm not sure if they realize how funny that sounds.

---------- Post added 10-09-17 at 05:44 AM ----------


Well, it does seem that some old lenses suffer from that. Especially if they've spent time near the equator.

---------- Post added 10-09-17 at 05:45 AM ----------


I always thought that name was just plain strange. But when I think about naming premium lenses with *, it makes a certain sort of sense.
Forum: Pentax SLR Lens Discussion 10-09-2017, 03:36 AM  
HD lens coating -- bad name?
Posted By fredralphfred
Replies: 27
Views: 1,009
But much less amusing.

---------- Post added 10-09-17 at 05:36 AM ----------


I still like "super-duper multi-coating" better. :D
Forum: Pentax SLR Lens Discussion 10-09-2017, 12:00 AM  
HD lens coating -- bad name?
Posted By fredralphfred
Replies: 27
Views: 1,009
Who else thinks Pentax should have called their new lens coating "sdmc" instead of "HD"?
Forum: General Photography 10-08-2017, 11:59 PM  
Great read! About Camera Hype..
Posted By fredralphfred
Replies: 24
Views: 1,124
You would rather he use than than then? Then how do you use than?
Forum: General Photography 10-08-2017, 09:47 PM  
Great read! About Camera Hype..
Posted By fredralphfred
Replies: 24
Views: 1,124
Give Ricoh some credit. I think they are choosing the appropriate marketing vehicle for the most likely audience. I hope (for their sake) that they sell truckloads of Thetas. Because of not only price, but also complexity and skill requirements, the market for the K-1 is going to be much smaller and more selective (and less subject to "viral marketing") and the 645Z even more so. Do you really think someone is going to buy into a $15,000 camera system (assuming you're going to buy more than one lens) because of a picture on Instagram?

I think Ricoh gives those cameras lots of love. Both were (are) very hard to get for months after their introduction -- what more do you want? And Ricoh is investing in Pentax, especially lenses. I believe lenses sell cameras. Lenses are why I decided to purchase Pentax as my first "real camera" in 2008 as opposed to Nikon or Canon. Ricoh even has a new APS-C lens on their roadmap, which excites me -- I was worried that they would stop developing new lenses for their APS-C cameras because they "can work with" full-frame lenses. (Having said that, I really wouldn't mind a "minor reworking" [if such a thing is possible] of the rest of their line-up to replace all SDM's with DC's & move smc coatings to HD. And if I can complete my wish-list, I want them to put the straight aperture blades BACK into the HD 15 & 21.)
Forum: Pentax Film SLR Discussion 10-08-2017, 08:04 PM  
d fa 70-200 film body?
Posted By fredralphfred
Replies: 10
Views: 653
Yeah. I thought that P-TTL was developed because they couldn't meter flash "Through The Lens" any more while the picture was being taken due to the difference in reflectivity between digital sensor & film. I was unaware that P-TTL had any advantages over TTL.
Forum: General Photography 10-08-2017, 12:10 AM  
Great read! About Camera Hype..
Posted By fredralphfred
Replies: 24
Views: 1,124
Doesn't like "pixel peepers," often advocates using S- or M-sized .jpg files, always telling me what "professionals" do or what "professional" equipment is like (that's how I know mine isn't), etc.

But he still has some good advice from time to time, and at least he's honest about his opinions (even if he does value them highly). He provides food for thought.
Forum: Troubleshooting and Beginner Help 10-07-2017, 09:36 PM  
What lens size would one recommend for a car show with my K-X
Posted By fredralphfred
Replies: 18
Views: 970
Thanks for the shot of the Trueno (AE-86). I watched "Initial D" but never saw a real one. Also, I swear that they misspelled the writing on the grill in some of the cart00ns.
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