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Forum: Post Your Photos! 2 Days Ago  
Landscape The reader
Posted By bdery
Replies: 1
Views: 110
I love the mood on this one. My son is able to read anywhere.

Forum: Post Your Photos! 2 Days Ago  
Landscape Flowing water
Posted By bdery
Replies: 0
Views: 96
I had fun with the FA 20-35, a polarizer, and my Peak Design Travel Tripod doing long exposures last week-end while camping. The cascade there are pretty dramatic.

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Forum: Lens Clubs 2 Days Ago  
the Pentax 40mm and 43mm Lens Club
Posted By bdery
Replies: 218
Views: 11,378
The FA 43 is such a reliable and dependable lens. When light gets low, I put it on and am always amazed by the results. Even in simple settings.

Forum: Pentax SLR Lens Discussion 2 Days Ago  
DA*60-250 Out of stock?
Posted By bdery
Replies: 64
Views: 2,165
Small batches, granted. A batch being the number of parts which can enter in a coating chamber. That would constitute a production "unit" as far as Lean manufacturing is concerned. As for the setup time and costs, applying SMED (single minute exchange of dye) strategies are the way to go.

These processes were invented by the japanese and improved after the second world war. It's sometimes called the "Toyota method" and its productivity and cost benefits have been tested over and over ;)
Forum: Pentax SLR Lens Discussion 2 Days Ago  
DA*60-250 Out of stock?
Posted By bdery
Replies: 64
Views: 2,165
I certainly hope they do not work that way. That's the reverse of Lean manufacturing. Inventory takes up space, costs money, and brings no income until it sells.
Forum: Pentax SLR Lens Discussion 06-23-2020, 10:43 AM  
DA*60-250 Out of stock?
Posted By bdery
Replies: 64
Views: 2,165
I personally disagree. Its sharpness is more even than the 70-210, a DFA lens to start with. Bokeh is not impacted by modifying for FF, colours are the same. Sharpness is important, but all the other perks of the 60-250 are still there.

To me it's a STAR lens in any situation. I simply wish auto vignetting was available.



That's certainly likely.



That might also be true.



You got me smilinng here ;)



It didn't feel disappointing to me. It's definitely biased towards the center.



With the 60-250, as you know I've tested the F 1.7x AF TC and got impressive results (for the record, I've gotten sharper images when disabling the SR system).





Likewise.



I don't think so. Even when they don't do the design, there's a huge amount of time and money involved in standardizing a new product. They'll keep it in the lineup as long as they can, I think.
Forum: Pentax SLR Lens Discussion 06-23-2020, 06:56 AM  
DA*60-250 Out of stock?
Posted By bdery
Replies: 64
Views: 2,165
The Pentax comment was that, when adapted for FF, it stopped meeting their criteria for STAR lenses. It's certainly STAR on APS-C.



The 70-210's corner performances are not as good as those of the 60-250, so it cannot be a star lens.
Forum: Pentax SLR Lens Discussion 06-22-2020, 10:37 AM  
DA*60-250 Out of stock?
Posted By bdery
Replies: 64
Views: 2,165
Not going to happen according to a Pentax rep I talked to. Japan headquarters engineers tested it and it didn't meet their standards for a STAR lens on FF. I tend to disagree, as I've shown in my review of the DFA 70-210 (when comparing to the 60-250) but that's the company's opinion.
Forum: Pentax SLR Lens Discussion 06-22-2020, 05:43 AM  
Pentax 60-250 F4 vs Sigma 70-200 F2.8
Posted By bdery
Replies: 36
Views: 3,653
Having tested both I can shed some light on the original question:

The Pentax is WR, silent AF, longer range (significant at the wide end, 60mm vs 70mm is important), more compact, better built, easier to handhold, better removable foot, lighter, as sharp as the Sigma at F4, sharper than the Sigma (not by much) at 200mm, 250mm is a bonus

The Sigma is one stop faster (softer but sometimes it's necessary), internal zooming, whereas the 60-250 extends out when zooming. The newer version also is silent to focus.

There is also a Tamron 70-200 F2.8 which can be considered. It compares well to the Sigma, except it's available new for less money. It doesn't have silent AF. There is a comparison review with Pentax's 70-200 F2.8 available if you want to read about it.

I went with the 60-250 many years ago, and never regretted it. I tested the new 70-210 F4 from Pentax and it didn't convince me to replace the 60-250 with it.
Forum: Pentax SLR Lens Discussion 06-19-2020, 05:36 AM  
What kits would you make up from these lenses?
Posted By bdery
Replies: 33
Views: 1,339
I would not, personally, split the way you proposed. I would try to cover a wide range of focal lengths.

I think it also depends on what you want to shoot, which lenses you prefer.

Going for size, I would see a kit with

21 - 40 - 70

That prevents you from shooting macro. Another lineup could be

15 - 40 - 100

which gives you the widest range. Maybe add the 70 if you want more granularity.

Between the 21 and 15, in fact, it will boil down to your preferences. I'd say the same about the 35 and 40, or about the 40 and 50. But I never warmed to 50mm on APS-C, 40 always seemed more natural to me. So the 50 is not a lens I'd consider in your kit. The macro is your only WR lens (that's the WR version, right?) so it might prove invaluable. You could swap the 70 for the 100 in the first proposal and gain reach, macro and WR. Or you could swap the 40 for the 35. But if it was me, I'd build any lineup around the 40 :)
Forum: Pentax DSLR Discussion 06-19-2020, 05:02 AM  
I'm gonna' SCREAM
Posted By bdery
Replies: 35
Views: 2,104
Well that sucks. Sorry for those troubles.

Forum: Pentax SLR Lens Discussion 06-17-2020, 07:59 AM  
The FA Conundrum
Posted By bdery
Replies: 41
Views: 1,733
And recently they have been completely overhauled, with 50s leaving the double Gauss behind in order to get those few % of further improvement.



Correct. As some have shown, it's still a mixed bag. Lenses like the 20-35 are still very well regarded, as is the 24-90 also. Those might bot be "bargain" lenses but they are not STAR lenses by any mean.

Lens design tools, available materials and manufacturing processes, as well as the users' ability to test their lenses in the film era all explain why those cheaper zooms haven't aged well.
Forum: Pentax DSLR Discussion 06-15-2020, 05:57 AM  
What's your battery/charging station look like?
Posted By bdery
Replies: 14
Views: 782
Given how long DSLR batteries last, I just plug in the charger when needed.

For your setup, it seems to work well apart from the zip ties which bother you.

You could use a flat surface and attach some double-sided tape underneath the chargers, that would give you a clean surface.
Forum: Pentax SLR Lens Discussion 06-15-2020, 05:47 AM  
16-85 off... other choices?
Posted By bdery
Replies: 22
Views: 1,257
That was my thought exactly, these lenses are better than they should be, really inexpensive, and reliable.

Given that the replacement is needed for only a short time, I would not be looking at spending tons of money.
Forum: Homepage & Official Pentax News 06-15-2020, 05:45 AM  
Venus Laowa 60mm F2.8 2x Super Macro Review Posted
Posted By bdery
Replies: 2
Views: 232
Yep, the usefulness of such a lens is the relative simplicity of use. You don't need extra accessories to reach those large magnifications values.
Forum: Pentax Camera and Field Accessories 06-11-2020, 11:56 AM  
Lowepro Lens Trekker 600 AWii
Posted By bdery
Replies: 7
Views: 544
You're not getting much feedback, sadly. Have a look at Think Tank's equivalent, also, in my experience Think Tank has consistently delivered better craftsmanship than Lowepro.
Forum: General Photography 06-11-2020, 11:53 AM  
What is your everyday lens ?
Posted By bdery
Replies: 73
Views: 2,395
Indeed, there are three.

The first I've used for many years. You can find it used. It's screw-drive, very good optically, good close focus capabilities, not so good for live view AF.

Second version, mostly similar optically, a tad faster at 70mm.

The latest, contemporary version. Better all around, it's certainly available new still.
Forum: General Photography 06-10-2020, 06:36 AM  
What is your everyday lens ?
Posted By bdery
Replies: 73
Views: 2,395
There's a solid review here on Pentaxforums, and tons of user reviews and posts :)

I think there are three options in the range you are looking at (from Pentax):

17-70 : constant aperture, very good optically, decent size, no WR, "short" focal range

18-135 : longest focal length, shortest size, WR, very good optically, most versatile, not very wide focal length

16-85 : physically largest, widest focal length, arguably best optically, WR

There is also the Sigma option of the 17-70 : widest aperture (F2.8) at the wide angle, otherwise mostly comparable to Pentax's 17-70.

You will find a lot of love on the forum for the 16-85. I know I loved mine when I was shooting APS-C (and even for a while when shooting FF). The 18-135 is loved mostly because of its small size and versatility, and it's well-deserved. The 17-70 is respected, its users like it, but it suffered strong competition from Sigma's equivalent lens so there are probably fewer users in total.
Forum: Pentax Camera and Field Accessories 06-10-2020, 06:20 AM  
Looking for a good relatively inexpensive green screen
Posted By bdery
Replies: 6
Views: 451
Paper rolls are able to slide on standard stands, many photographers use them because if they can damaged or dirty they can be cut and use a new section.

I personally prefer PVC as it is more durable but opinions vary.
Forum: Pentax SLR Lens Discussion 06-09-2020, 08:18 AM  
Landscape lens question
Posted By bdery
Replies: 24
Views: 1,210
On this list, my favourite is the Venus 12mm, mainly because of the IQ, low distortion, build quality.

See here:

Venus Optics Laowa 12mm F2.8 Zero-D Review - Introduction | PentaxForums.com Reviews

Irix 15mm F2.4 Firefly & Blackstone Review - Introduction | PentaxForums.com Reviews
Forum: Pentax Camera and Field Accessories 06-09-2020, 05:49 AM  
Looking for a good relatively inexpensive green screen
Posted By bdery
Replies: 6
Views: 451
Wrinkles are the one thing to avoid.

Paper is a good choice. I also like PVC sheets, they are often more matte and more durable.

If you want a canvas, I strongly suggest getting one which can be stretched, instead of muslin. I have a black backdrop, I got it from B&H and believe it's this:

Westcott 9 x 20' Wrinkle-Resistant Polyester Backdrop 138 B&H

I use cheap clamps to hold it stretched by clamping along my vertical posts. It creates a clean, uniform and wrinkle-free background in seconds. I've seen photographers use heat and vapour to remove wrinkles with little success, using a stretch fabric is much simpler.
Forum: Photographic Equipment for Sale 06-09-2020, 05:40 AM  
For Sale: Pentax 110 rare Safari / Maron version with 24mm Lens REDUCED
Posted By bdery
Replies: 9
Views: 1,275
Oh my God those colours!

There was a time where beige and brown were the thing...

God luck with the sale.
Forum: Pentax SLR Lens Discussion 06-05-2020, 10:10 AM  
Support for heavy lenses
Posted By bdery
Replies: 9
Views: 681
I'm guessing the people at Pentax have an idea :P

When using heavier lenses, I tend to support them from the lens, also, whenever possible. Given that lenses such as the DFA 70-210 F4 do not have a tripod collar or any means of supporting the lens itself, I'd guess taht anything under a kilogram is probably completely safe.

Also, when releasing the DFA* 50mm, Pentax designers said that they delayed the lens because its weight created stress which moved the lens elements ever so slightly. So they are aware of the effect of weight. And not worried about strucrural damage.
Forum: Pentax SLR Lens Discussion 06-04-2020, 05:11 AM  
Pentax 70-210 zoom push stuck!
Posted By bdery
Replies: 6
Views: 491
I suggest looking to find repair manuals online, you might get lucky.

Each lens is different, even though there are similarities. I suggest, if you attempt it, to document and photograph each step you take, so as to avoid mistakes when putting it back together.
Forum: Pentax SLR Lens Discussion 06-03-2020, 05:04 AM  
First tests with the Pentax-F 1.7x TC and 60-250
Posted By bdery
Replies: 18
Views: 840
So far it has not struggled a tall. I have not tested it in very low light, but inside the house, at night, it works as expected, and is pretty fast!
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