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Forum: Pentax News and Rumors 10-18-2020, 05:27 PM  
'Be patient and wait' (Kimio Tanaka)
Posted By climbmountainway
Replies: 148
Views: 16,672
Every time management has to go to Viet Nam, or the Philippines about this or that manufacturing detail, they are put in quarantine: both ways. And, there was no TP in either location's rest rooms with factories on standby, and there were no masses eagerly waiting for the excellent new lenses without first finding correlative excellent new body designs on shelves (buyers too had to be isolated, at home, and without incoming cash flow). Further, they had to get all those exciting video discussion generations standing by while running in place together in their Cook's Parlor to unfreeze the molasses. Otherwise, we would have to wait until next summer when the molasses flows without such informative videos slow motion tracking on toward undeclared marketing. Oh, and while concentrating on the new viewfinder ergonomics, someone forgot that a mirror needed putting back in because the flagship is not to be a mirrorless of the mirrorless Age.
Forum: Digital Processing, Software, and Printing 10-13-2020, 05:45 AM  
New software on old files
Posted By newmikey
Replies: 3
Views: 985
So I have moved my total history stack from Flickr to my own website and with that came the need to do some much overdue culling. I also thought i would be quite neat to have a go at some old captures with new software (as well as the new skill learnt over the more than 10 years since).

So here's a 2009 conversion of a PEF raw file shot with the K100D-Super and the Sigma 24-135mm zoom. It's a bit noisy in the darker colored areas, the lens' pincushion effect is visible, it is clearly a bit oversharpened and the keystoning could have been more precise:


Back to 2020 and redoing this raw file with the newest release of ART (Another Raw Therapee), Gimp and GMIC. I am quite surprised the file stood the test of time so well. I can put it in between my KP's 24MP files on a web gallery or even large screen and and would not seem out of place. I even printed off both versions and the new one is that much cleaner and show ample detail.


My conclusion is that we had damned good Pentax bodies back in 2009 and we have superb software available today, way more than was available to your average open-source photographer back then.
Forum: Pentax K-1 & K-1 II 10-16-2020, 05:45 AM  
Post your K-1 pictures!
Posted By Coiseam
Replies: 38,022
Views: 3,733,708
Zeiss Distagon 28 2 ZK, f8, Pentax K-1

Stitched with Microsoft Composite Image Editor.

Forum: Pentax News and Rumors 10-13-2020, 06:26 AM  
New Theta plug-in: Person Detection & Counting
Posted By Mistral75
Replies: 4
Views: 2,048
This one is more business-oriented than the former ones.

Person Detection & Counting is a plug-in for Theta V (firmware ≥ 3.50.1) and Theta Z1 (firmware ≥ 1.60.1) that Ricoh Imaging released on the 13th of October, 2020.

Notification of the release of a new RICOH THETA plug-in | RICOH THETA

User manual: https://support.theta360.com/intl/ricoh_plugins/pdf/persondetectionandcounting_en.pdf

Link to install the Person Detection & Counting plug-in: Person Detection & Counting | RICOH THETA Plug-in Store
Forum: General Talk 10-05-2020, 04:35 AM  
Saying goodbye to Flickr
Posted By Gray
Replies: 16
Views: 1,546
I host my own photos and have done so for years. I use Lightroom 3.6 + the free Gallerific plugin. It takes very little effort to upload and organise images, as long as I have some idea of FTP and folder security. I then just share links and/or passwords with friends and family. It's a great way to share without losing control.

Here's a random example from a day hike on a computer monitor display. The plugin makes the gallery display nicely whatever the device or screen size.



The plugin is available at
http://trialstravails.blogspot.com/2015/07/gallerific.html


Forum: Pentax News and Rumors 09-29-2020, 08:28 PM  
Ricoh Imaging appointed global spokesperson
Posted By FozzFoster
Replies: 106
Views: 12,229
"
Xin Ranjun Ricoh Fun Club Today [GRowING]
Li Xian, the first global spokesperson for Ricoh images.

Ricoh Imaging Instrument Trading (Shanghai) Co., Ltd. (hereinafter referred to as "Ricoh Imaging")
Gladly announce:
From September 30, 2020,
Mr. Li Xian became the global spokesperson for the entire line of Ricoh Imaging products.

As the only wholly-owned subsidiary of Ricoh Imaging Co., Ltd. (located in Ota-ku, Tokyo, Japan) in Mainland China, Ricoh Imaging Instrument Trading (Shanghai) Co., Ltd. was established in Shanghai on February 9, 2007. The company has a complete sales system from sales, sales support, advertising, and after-sales service, thereby expanding the sales of the company's main products centered on digital cameras in the Chinese market.

Ricoh Imaging’s imaging products include: GR series professional portable digital cameras, PENTAX digital SLR cameras, THETA 360° panoramic cameras, optical lenses, camera accessories, optical telescopes, CCTV closed-circuit television monitoring equipment, etc.

The company is committed to contributing to China's imaging industry and bringing high-quality imaging products to consumers.



Character Introduction
Li Xian

Powerful Film and Television in Mainland China, actor Li Xian was born on October 19, 1991 in Xianning, Hubei.

A powerful film and television actor in mainland China, graduated from the 2010 Beijing Film Academy's Performance Department.

In 2019, the TV series "Dear, Loved" is well known and loved by the audience.

In life, Mr. Li Xian also loves photography very much. Whether in the work set or on social networks, he can often find scenes shot with the Ricoh GR camera.



Now, Ricoh Imaging will join hands with Mr. Li Xian,

To record together what is worth remembering in the growth process of each of us

Every good moment.
We believe that these moving moments will be in our lives

The best memories.
To every dear, you who love life.


Ricoh X Li Xian
GR ow ING with you !
"
Forum: Pentax News and Rumors 09-28-2020, 10:00 PM  
Meyer Optik Görlitz Trioplan 50 f/2.8 II lens for Pentax K-mount now available
Posted By maw
Replies: 11
Views: 3,499
The new Meyer Optik Görlitz Trioplan 50 f/2.8 II was presented after the other focal lengths.

is already on sale on B&H for $899.00





Pentax Rumors Meyer Optik Görlitz Trioplan 50 f/2.8 II

Characterized by its distinct soap bubble bokeh, and reënvisioned with a close-focusing function, the Trioplan 50mm f/2.8 II from Meyer-Optik Gorlitz is an update to a classic, vintage lens, and designed for Pentax K-mount cameras. Version II of this normal-length, manual-focus prime utilizes a revised triplet optical design to produce a distinguished image quality with strong colors and central sharpness, along with improved contrast and higher resolution rendering. Also, twelve aperture blades further help to produce smooth circular bokeh that is the lens's calling card. Differing from the classic design of the century-old predecessor, this lens does feature modern coated Schott glass optics for notable contrast and color neutrality when working in strong lighting conditions. Additionally, the lens also features a movable front element, independent of the focusing action, which increases the maximum magnification to 1:4 for working with nearby subjects as close as 9.8" away.

Version II of this lens sees an improved optical design to achieve greater contrast and resolution, along with a redeveloped mechanical design with smoother operation and a more streamlined form factor.

Normal-length prime is designed for full-frame Pentax K-mount cameras, however is also compatible with APS-C models where it will provide an 75mm equivalent focal length.

Using a traditional triplet optical design, this three-element, three-group lens produces a uniquely classic image quality coupled with a distinct "soap bubble" bokeh quality.

Coated Schott glass is used for high clarity and contrast, as well as reduced lens flare and ghosting.

The front element of the lens can be moved independent of the focusing action in order to achieve a maximum 1:4 magnification ratio for photographing close-up subjects.

Manual focus design permits working with subjects as close as 9.8" away.

Twelve diaphragm blades help produce an artistic and distinctly circular bokeh quality.

Front 52mm filter thread is consistent throughout the Meyer-Optik Gorlitz version II lens series.
Forum: Pentax News and Rumors 09-27-2020, 11:09 PM  
Ricoh Imaging appointed global spokesperson
Posted By Eebll
Replies: 106
Views: 12,229
A quick Google, Canikons and their ilk should be a trembling..... Luke 10:19 Behold, I give unto you power to tread on serpents and scorpions and over all the power of the enemy, and nothing shall by any means hurt you.
The K new, almighty, all powerful. Is that speculative enough?? lol
Forum: Pentax News and Rumors 09-26-2020, 09:58 AM  
PENTAX issues multiple lens design patents
Posted By beholder3
Replies: 103
Views: 10,692
Depends on what you intend to shoot. The 1:3 max magnification of the 70-210/4 is where I personally consider it "macro" already.

Remember that 1:3 means that on a 36mm wide FF sensor you'll be able to completely fill the frame with a subject that is just about 10 cm wide (3x 3,6xm). For flowers and dragonflies that should be good enough for many.

My personal favorite "macro" lens alway was the DA*300/4 plus TC. :)

---------- Post added 26th Sep 2020 at 19:02 ----------



Rondec already linked to my old table, so here it is again for those who don't want to follow links:

Forum: Pentax News and Rumors 09-24-2020, 02:20 AM  
PENTAX issues multiple lens design patents
Posted By OoKU
Replies: 103
Views: 10,692
APSC 16-50/2.8 18-100/2.8
??2020-154286 | ???????IP Force?

DFA70-300/4.5-5.6SR
DFA70-200/2.8 SR
??2020-154288 | ???????IP Force?

DFA*85/1.4
??2020-154060 | ???????IP Force?
Forum: Photographic Industry and Professionals 09-22-2020, 02:18 PM  
Pentax K-3 II successor on September 2020
Posted By totsmuyco
Replies: 977
Views: 101,076
Yes, there were strict movements particularly those places with high infection rates. And not only in Cebu but other places in the Philippines as well. At times people need endorsements from the company that they need to go to in another province, city or region. Upon arrival, they have to undergo quarantine for 14 days before they will be allowed to go the company that they need to work. For example installation of an equipment. After doing the project and upon returning to their place of origin, they have to have another 14 day quarantine period.
Forum: Photographic Industry and Professionals 09-22-2020, 05:23 AM  
Pentax K-3 II successor on September 2020
Posted By totsmuyco
Replies: 977
Views: 101,076
Unless materials were available earlier and manpower were not quarantined or locked down then, I can say they can give us the camera on time. However if not, there will definitely be a major delay in production. Cebu was under Enhanced Community Quarantine for about 3 to 4 months.
Forum: Photographic Industry and Professionals 09-18-2020, 08:14 AM  
Pentax K-3 II successor on September 2020
Posted By Mistral75
Replies: 977
Views: 101,076
May be your noting the first day of fall (the 22nd of September but Japanese time) being an important date for the KNEW is linked to the following tweet from Kimio Tanaka?
Forum: Photographic Industry and Professionals 09-18-2020, 05:13 AM  
Pentax K-3 II successor on September 2020
Posted By dave_roe
Replies: 977
Views: 101,076
In Italy you adapt.

The scene:
You walk into a bar, no tables to sit, relax and enjoy your coffee. Only a little counter space open.

You decide to rest the KI-MII and stand. No room for the coffee. Wrong.

The flippy screen - why you don't leave home without it!
Forum: Pentax SLR Lens Discussion 09-12-2020, 02:28 PM  
HD Pentax-D FA* 85mm F1.4 SDM AW Exif Data.
Posted By pschlute
Replies: 5
Views: 1,065
In Silkypix you can easily add it yourself.

Image properties/Lens.....select and type in the name of the lens as you wish it to appear in the EXIF.

You only need do this once. It remembers the tag for any future processing.
Forum: Pentax News and Rumors 09-16-2020, 06:55 AM  
Patents possibly linked to the APS-C flagship
Posted By bencoskater
Replies: 120
Views: 16,950
By looking the side view of the camera (K-1 vs K-new), it's still there:


So @rawr seems to be right on the assumption. They won't ditch the SAFOX easily.
Forum: Pentax News and Rumors 09-15-2020, 07:15 PM  
Patents possibly linked to the APS-C flagship
Posted By bencoskater
Replies: 120
Views: 16,950
Wow you did a great job rawr.

In the patent they use a 3x3 matrix for each color:
https://ipforce.jp/Kouhou/img?n=0006740666.tif&id=000005&c=B9&t=111813181
https://ipforce.jp/Kouhou/img?n=0006740666.tif&id=000006&c=B9&t=111813181

Here is an explanation of the auto-focus system:
[0026]
When the release button is pressed halfway, the focus is adjusted. The system control circuit 40 executes AF processing based on the pixel signal read from the image sensor 32. That is, the amount of defocus is calculated to shift the image plane to the in-focus position. In addition, AF processing by multipoint ranging can be executed.
[0039]
In order to form a pair of divided images according to the pupil division phase difference method, the focus detection pixel pair PB is formed with light-shielding films SL and SM that block half of the pixels. The light-shielding films SL and SM are formed at positions symmetrical with each other so that a pair of divided images are formed from each focus detection pixel pair.
[0040]
The focus detection pixel pairs PB, PG, and PR are not limited to the configuration in which they are arranged adjacent to each other in the oblique direction, and may be adjacent to each other in the row direction and the column direction. The light-shielding films SL and SM may also be formed at positions according to the arrangement direction of the focus detection pixel pair so that a pair of pupil division images can be obtained.
[0041]
For AF processing by multipoint distance measurement, a plurality of (nine here) divided distance measurement areas are defined for the entire image pickup area IM of the image sensor 32 ( see FIG. 5 ). When the AF process is performed, the focus detection process is performed based on the focus detection pixel pairs PB, PG, and PR belonging to the divided ranging area in which the target subject is projected.


Multi-point focus will be supported. All this part seems to confirm the end of SAFOX.
might be a 128K sensor (cross our fingers)

PS: Everything translated by google
Forum: Pentax News and Rumors 09-12-2020, 04:31 PM  
Patents possibly linked to the APS-C flagship
Posted By kwb
Replies: 120
Views: 16,950
Good question. There could be two things, I'll start with the one that probably has a bigger effect.

Reason 1.

Through a higher refractive index material, the focusing screen looks closer to the ocular lens. This is not just an optical illusion in that the higher the refractive index, the larger solid angle (Solid angle - Wikipedia) of light originating from any given point on the focusing screen reaches the ocular lens.

Forget about the prism shape, it's just a hunk of glass with one input surface and one output surface, reflections don't have anything to do with refraction. Instead, let's think about a point on the focusing screen, an empty space, and an ocular lens (Figure A). The point P emits light in a wide angle, and only a fraction of that reaches the lens. In this figure, I used the apex angle of cone of light that reaches the lens instead of the solid angle to represent how wide the cone is.

Next, without changing the distance between the focusing screen and the lens, fill the space with a glass plate with parallel surfaces (Figure B). Because of refraction, the apex angle of cone of light at P that reaches the lens is larger than before. From the lens, the focusing screen appears to be at a new location P', and the apex angle viewed from the lens is the same with the apex angle at P. The larger the refractive index, the larger the apex angle, thus the larger fraction of light from P reaches the lens to be relayed to the eye (thus brighter).

Suppose that you have two glass plates of the exact same thickness, one made of typical glasses like BK7 (n=1.516) and the other made of Ohara S-LAH66 (n=1.7725) that is one of the high refractive index materials mentioned in the patent. How much more solid angle do you gain by using the latter? Let's calculate the ratio of the solid angle!


It turns out that you don't need to know the exact dimensions for the calculations. As far as most of the space is filled with the glass (i.e. distance between the focusing screen and the pentaprism as well as between the pentaprism and the ocular lens are much smaller than the apparent path length of light), and as far as the ocular lens diameter is smaller than the apparent path length of light, the ratio is pretty much the same.
And that ratio is,
  • solidAngle(S-LAH66)/solidAngle(BK7) ~ 1.37

(for example if the entire space between the focusing screen and the lens is occupied by the glass, the ratio is ~1.369 when arctan(R/d)~5 degrees, 1.376 if arctan(R/d)~10 degrees).
That is, assuming that the reflection at the input and output surfaces are negligible in both S-LAH66 and BK7 because of good anti-reflection coating, 30-something percent more light reaches the ocular lens originating from P.

Note that this is an optimistic estimate and should be considered an upper limit. In reality, though the light is indeed emitted with a large angle from P, the light intensity is not distributed evenly to all directions (e.g. the light is stronger at the center of the cone) and therefore the ratio of the light energy (number of photons) is somewhat smaller than the ratio of the solid angle. There could be other gotchas. 37 percent could easily be 30 or even 20 percent. But this is NOT a few percent effect.

But the view is larger in the new VF, thus increase in the photon number is distributed over a larger area for your view. This will counteract to make your view dimmer. Using the square of the magnification ratio, this effect is
  • mag(K-NEW)^2/mag(K-3)^2 = (1.01/0.95)^2 = 1.13.

Ratio of brightness per area on your retina is therefore
  • brightness(K-NEW)/brightness(K-3)~ 1.37/1.13 ~ 1.21.

Wow, 20% brighter, maybe this is too much but as an optimistic estimate that should be considered an upper limit, I claim success.

Reason 2.
The higher the refractive index, the smaller the critical angle (Total internal reflection - Wikipedia), therefore smaller transmission on roof surfaces for angle of incidence (AOI) smaller than the critical angle. (FYI if AOI is larger than the critical angle, light is 100% reflected without transmission.) This is something that is very briefly mentioned in the patent. There should be such an effect, but it's hard to imagine that this is a huge effect that can possibly explain 10% brighter VF.
The reason why I don't believe this to be the dominant effect is because the AOI on the roof panels is already larger than the critical angle even for BK7 for the vast majority of rays. Critical angle for BK7 and S-LAH66 are 41.3 degrees and 34.3 degrees respectively, while the AOI on roof panels for the light perpendicular to the input surface is 49. 2 degrees.



Wow, ogl didn't call people liars as far as I see. And no, actually it's not explained in the patent, the patent is not about the brightness of the VF per se.
The patent is about the recipe for multi layer dielectric coating on the roof panels of the roof pentaprism and other prisms with a roof. Without coating, the view quality (contrast and sharpness) suffer, regardless of the refractive index and brightness, according to them. Prior art exists for regular glass materials like BK7, but not for higher refractive index materials, thus this patent.

Sorry for long post!
Forum: Pentax News and Rumors 09-12-2020, 02:46 PM  
Patents possibly linked to the APS-C flagship
Posted By kwb
Replies: 120
Views: 16,950
Hi gaweidert, the shape and the size of a pentaprism is not dictated by the refractive index.

You don't want to change relative angles between surfaces of a roof pentaprism regardless of refractive index, because these define the function of the prism. Ridge of the roof is 22.5 degrees tilted relative to the input surface, roof panels are orthogonal to each other, internal bisector of the roof panels is orthogonal to the input as well as the third reflection surface, the third reflection surface is tilted 45 degrees relative to the roof ridge, and the output surface is orthogonal to the input surface.
You can make the overall size bigger or smaller, or make some surfaces closer to or farther away from other surfaces. This is bound by physical constraints like the size of the focusing screen (which is ultimately determined by the sensor size) and the position of the ocular lens (which is ultimately determined by the position of human eye), and by practical considerations like the size of the prism as well as the ocular lens system.

You can shape a roof pentaprism exactly like the one in K-3 using higher refractive index material, put that in K-3, and the new pentaprism still works in that it relays the light from the focusing screen to your eye without problem (actually better than the old one in a sense as I'll explain in my reply to ogl later). Of course the focusing screen "looks closer" viewed from the ocular lens due to larger refractive index, just like fish looks closer in water than it physically is. Existing diopter adjustment might not be enough to compensate for that, and you'll want to to change the ocular lens parameters. But the shape of the prism doesn't have to change just because of different refractive index.

BTW, roof pentaprisms are reflective prisms (reflective prism - Wikipedia), not dispersive ones (dispersive prism - Wikipedia).
By design, exit angle of light on the output surface is ALWAYS the same as the angle of incidence on the input surface regardless of color for reflective prisms. Among other things, this means that refraction effect of reflective prisms is equivalent of that of a glass plate with parallel surfaces (while that of dispersive prisms is equivalent of a wedge-shaped glass plate). Unlike dispersive prisms, reflective prisms don't separate co-propagating rays of light into different directions depending on color.

That's not to say that there's no dispersion ( Dispersion (optics) - Wikipedia ) effect in reflective prisms, but since that does NOT cause angular difference depending on colors, it's not that big of a deal for focusing systems like viewfinders, just like using an ND filter or UV filter, which are glass plates, won't give you color fringes for you camera, or looking through a glass window won't give you a rainbow-colored world for you to enjoy. The effect is there but is to small to matter.
Forum: Flashes, Lighting, and Studio 08-11-2020, 10:14 AM  
Xpro-P TTL Wireless Flash Trigger for Pentax
Posted By Pablo Villegas
Replies: 293
Views: 44,381
Well, my X2T-P arrived like an hour ago, and i just tested it. it works out of the gate with the AD360ii in HSS! I dont know why people reported it as not working, I did absolutely nothing special, just turned both on and chose the trigger sync as HSS, that’s it! no need to do anything else on the flash. You can change power as well.


One image is at 1/400 and the other one is at 1/250 on a Pentax 645D that sync tops at 1/125. The Godox 360ii changes from regular to HSS when you go pass 1/125 of a second in camera, automatically.

You can check the settings in Flickr
https://flic.kr/p/2jvgK4S
https://flic.kr/p/2jvjpUg
Forum: Pentax News and Rumors 09-07-2020, 12:34 AM  
Product Stories of New APS-C
Posted By OoKU
Replies: 501
Views: 50,339
OVF reach D500.
LV close to 90D.
Forum: Pentax News and Rumors 09-05-2020, 06:31 PM  
Another snippet from Pentax HQ
Posted By baba_yaga
Replies: 410
Views: 36,994
Given the rather modest size difference between the new APSC body and the ergonomically and optically excellent FF K-1, I see the price point difference as a crucial factor. I have been perfectly happy using a mix of FF and crop lenses on the K-1ii and in my experience the difference between having let's say the 70/2.4 mounted on the K-5 or K-3 vs on K-1 is negligible. If anything, the K-1 feels and works better for me even with the small DA lenses on it. Unless the new crop body has other aces up it's sleeve beyond the viewfinder, or costs substantially less than the discounted K-1ii, the latter may be a more attractive and open-ended option even for those who at the moment own only crop lenses.
Forum: Pentax K-1 & K-1 II 08-27-2020, 02:15 PM  
Ugh the temptation
Posted By Sakura
Replies: 31
Views: 7,710
it is so recognizable, got the same thing. The first look trough my K1-11 viewfinder, i almost shed a tear, it really threw me back to my old and extremely loyal MX experiance. I finally felt at home again again.

And yes, i know, i am extremely spoiled, using an MX as my first SLR after years of using a Beirette (which i still own) in my kids years
Forum: Pentax News and Rumors 08-20-2020, 12:23 PM  
Patents possibly linked to the APS-C flagship
Posted By Kunzite
Replies: 120
Views: 16,950
Hello, folks!
I was just doing some random surfing on the IPForce Japanese patent website ;) and I've seen two new patents published. Sorry, in Japanese, but Google Translate does a decent job.

One is about a new type of pentaprism using high refraction glass. Sounds familiar?
I don't understand 10% of it, but it seems making a pentaprism is far from a trivial task! They're talking a lot about avoiding double images and other defects.
??6743398 | ???????IP Force?

The other is about a focusing system using a stacked sensor. I guess it would be more accurate with subjects of various colors. Interesting, but will we see it implemented?
??6740666 | ???????IP Force?
Forum: Pentax News and Rumors 08-15-2020, 07:05 PM  
R03010 = K-new was registered by FCC on 27 July 2020
Posted By Sankon
Replies: 238
Views: 30,774
I suspect K-4, based on the serial numbers of the four tested units in the FCC submission. "PP4-2 #196" etc. "PP" being "Pre Production", "4" being the model, and #196 (and the three other numbered units) being the serial.

Regarding one reading of "4" being the same as "death" in Japanese, while this is true, it has many other readings too. And there are many current and classic cameras (and other items) with "4" in the name, some of them quite successful 😁.

Also, after quarter of a century living in Japan, I have never seen a building here lacking a fourth floor...

S
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