Forgot Password
Pentax Camera Forums Home
 
Log in or register to remove ads.

Showing results 1 to 25 of 300 Search:
Forum: Pentax News and Rumors 15 Hours Ago  
Ricoh published several full frame ultra wide angle design patents.
Posted By Serkevan
Replies: 29
Views: 1,450
Well, technically it can (I recall a Nikon fisheye back in the days of forever ago), but it's a right hassle to lock the mirror up, attach the lens, and work only in LV :D
Forum: Pentax News and Rumors 2 Days Ago  
Updated Roadmap: New 100mm Macro Coming
Posted By Serkevan
Replies: 285
Views: 15,310
It depends. Sometimes modifications are much harder than starting from scratch, if there are pre-existing constraints that you have to respect.
Forum: Pentax News and Rumors 6 Days Ago  
Ricoh-imaging.eu to be replaced by brand-oriented sites
Posted By Serkevan
Replies: 45
Views: 2,980
Go figure, it's one of the reasons I actually shoot Pentax.


But yes, this whole spat is wholly off-topic.
Forum: Pentax News and Rumors 6 Days Ago  
Updated Roadmap: New 100mm Macro Coming
Posted By Serkevan
Replies: 285
Views: 15,310
To be clear, I'd prefer to have a quieter motor as well. But fixing the slow AF speed (at least entirely) is probably be out of the scope of the refresh.
Forum: Pentax News and Rumors 6 Days Ago  
Updated Roadmap: New 100mm Macro Coming
Posted By Serkevan
Replies: 285
Views: 15,310
Certainly possible! What I said earlier was that I doubted that anything outside Ring-Type SDM would be suitably fast. I wouldn't be surprised if DC was every bit as slow as the current screwdrive.
Forum: Pentax News and Rumors 6 Days Ago  
Updated Roadmap: New 100mm Macro Coming
Posted By Serkevan
Replies: 285
Views: 15,310
Then the DFA*85 could have used the DC motor instead of needing a ring-type SDM. It's a very simple matter of weight.
Forum: Pentax News and Rumors 6 Days Ago  
Updated Roadmap: New 100mm Macro Coming
Posted By Serkevan
Replies: 285
Views: 15,310
Again, the point is that the DFA 100 has to move the *entire* lens, half the barrel included, to focus.
Forum: Pentax News and Rumors 6 Days Ago  
Updated Roadmap: New 100mm Macro Coming
Posted By Serkevan
Replies: 285
Views: 15,310
If the optical formula is similar, the lens will focus by extension... Not sure anything other than a ring-type SDM (like the one in the DFA* 50 and 85) would have the torque to be suitably fast. For all its issues, screwdrive is actually a pretty powerful system.
Forum: Pentax News and Rumors 08-04-2022, 12:16 PM  
Updated Roadmap: New 100mm Macro Coming
Posted By Serkevan
Replies: 285
Views: 15,310
No, no. Outrage and pitchforks first, "oohs"/"aaahs"/"huh that's a good lens actually" later.
Forum: Photographic Industry and Professionals 08-04-2022, 12:10 PM  
Canon copies Pentax' 10+ year old automatic horizon correction in R7
Posted By Serkevan
Replies: 39
Views: 1,667
Eh, I'd argue that the in-lens stabilizer of long lenses is best for photographing motion because it helps keep the finder (and therefore the AF points) right where you want them. It doesn't have a lot to do with lowering the acceptable shutter speed.

I've handled a 300mm Nikon with ILIS - it does feel less wobbly and is certainly more comfortable to use, but I wouldn't be able to say how much bearing -if any- the feature has on actual keeper rates.
Forum: Pentax News and Rumors 08-04-2022, 12:28 AM  
Updated Roadmap: New 100mm Macro Coming
Posted By Serkevan
Replies: 285
Views: 15,310
That's what I get for looking at stuff first thing in the morning :o:o
Forum: Pentax News and Rumors 08-03-2022, 10:46 PM  
Updated Roadmap: New 100mm Macro Coming
Posted By Serkevan
Replies: 285
Views: 15,310
Is it me, or does the new version lack an aperture lever? KAF4, maybe?
Forum: Pentax News and Rumors 08-03-2022, 01:34 AM  
Updated Roadmap: New 100mm Macro Coming
Posted By Serkevan
Replies: 285
Views: 15,310
I'm not sure keeping the lens at the same size would allow for internal focus, so the focus group will probably be more or less the entire lens :lol:.
Forum: Pentax News and Rumors 08-02-2022, 01:33 PM  
Updated Roadmap: New 100mm Macro Coming
Posted By Serkevan
Replies: 285
Views: 15,310
"As long as it's above 60 a week" :p
(Yes, I'm jaded).

---------- Post added 08-02-22 at 01:39 PM ----------



No, I mean the only "on his free time" part might have been running whatever software to come up with a workable formula, just a proof of concept. Anything physical would most likely require approval for prototype expense (well, that's assuming that Pentax R&D doesn't have the capability to make a batch of glass elements in-house... AFAIK they buy all of it).
Personally, I think the most likely story is that a passionate engineer did some extra groundwork on the side, got management on board with a good idea for a cracking lens, and then it stopped being a "free time" project already pretty early on.
Forum: Pentax News and Rumors 08-02-2022, 11:30 AM  
Updated Roadmap: New 100mm Macro Coming
Posted By Serkevan
Replies: 285
Views: 15,310
I specifically left academia because it was *expected* that your job would live rent-free in your head 24/7/365.

The joke in my group was that part-time (officially all PhDs were paid for 20 h/week) was 12 h/day and full time was 24 h/day.

Now that I do R&D at a startup, I do still keep work in the back of my head from time to time or when I'm talking with my friends in the field - it's not the first time I beeline for the pilot plant because I had an idea off the clock. But it's certainly more in my own terms.

---------- Post added 08-02-22 at 11:36 AM ----------



I carry out projects more or less alone (well, communicating with my manager and the odd sanity check, obviously) until the pilot plant testing is nailed down... afterwards, it's time to get Engineering and/or Operations involved. It's perfectly possible that this engineer "just" ran the calculations for the optical design, showed it to the bosses, there was permission for a prototype, a "huh, looks great", and that's kinda it. Some projects take a fairly short time to rollout once the basics are working well.
Forum: Pentax News and Rumors 08-02-2022, 07:41 AM  
Updated Roadmap: New 100mm Macro Coming
Posted By Serkevan
Replies: 285
Views: 15,310
It's probably only for as long as they have glass elements. Once they run out, I expect they'll replace the DA 50/1.8 with a near-identical DFA 50/1.8 (or f/1.7 for historical purposes :lol:).

It's not really clever to have your only standard prime be a 1k chunk of glass, IMO.
Forum: Pentax News and Rumors 08-01-2022, 10:58 PM  
Updated Roadmap: New 100mm Macro Coming
Posted By Serkevan
Replies: 285
Views: 15,310
It's more about "is it possible to reduce fringing, while keeping the rendering, small size and weight?" If they can, well, go ahead.
Forum: Pentax News and Rumors 08-01-2022, 08:12 AM  
Pentax Club House to open in Yotsuya, Tokyo
Posted By Serkevan
Replies: 126
Views: 8,284
You can crop the GR lens to whatever telephoto length the iPhone has and it will look better anyway :D
Forum: Pentax News and Rumors 07-31-2022, 02:46 PM  
Six different versions of the Pentax K-3 Mark III
Posted By Serkevan
Replies: 427
Views: 32,879
Not a chance.
Forum: Pentax News and Rumors 07-31-2022, 11:20 AM  
Pentax Club House to open in Yotsuya, Tokyo
Posted By Serkevan
Replies: 126
Views: 8,284
Eh? 90-100mm is about the sweet spot for portable macro lenses; shorter focal length gets you very close to the subject at 1:1 magnification, and while longer FL obviously gives you more working distance, it also means the lens will inevitably be larger. It's also a fantastic length for portraits, and there are many older macros in this range where excellent macro sharpness meets delicious rendering (Two very well-known 90mm f/2.5 examples are the Tamron model 52B and Tokina AT-X, a.k.a. "Bokina". There's also the Voigtlander 90mm and 125mm SL lenses, or... you know, the very much loved Pentax DFA 100mm f/2.8 Macro WR ;)).

Honestly, I might be interested, depending on the rendering. The current one I don't really like enough to warrant substituting my Tamron, and it's gonna be competing with the DFA21 for funding, but who knows...
Forum: Pentax News and Rumors 07-31-2022, 04:43 AM  
Pentax Club House to open in Yotsuya, Tokyo
Posted By Serkevan
Replies: 126
Views: 8,284
I figure it's a combination of R&D not taking super long, giving a bit of freedom to the engineers to work on passion projects on the side, and the DFA 100 being a well-loved lens that sold pretty decently.
Forum: Photographic Industry and Professionals 07-30-2022, 03:43 AM  
The end of the SLR
Posted By Serkevan
Replies: 90
Views: 3,223
Yes, we will. Not you, or I. But if most industries are anything to go by... :fedup:
Forum: Photographic Industry and Professionals 07-29-2022, 12:35 PM  
The end of the SLR
Posted By Serkevan
Replies: 90
Views: 3,223
ISO over 6400 is another subscription.
You also get only the first 6 fps free with the Ka-ching3iii. Shooting at 9 fps costs you $0.01 per frame, shooting at 12 fps is a $0.03 cost per frame.
Forum: Photographic Industry and Professionals 07-29-2022, 09:14 AM  
The end of the SLR
Posted By Serkevan
Replies: 90
Views: 3,223
It used to be the case, but for Tamron, Samyang and Sigma it has been MILC-only designs for the last three or so years. Tamron in particular is IMO a better option than Sony for an e-mount camera, these days :lol:

Irix and Venus do make SLR lenses, but that's kind of it.
Forum: Pentax Full Frame 07-28-2022, 01:09 AM  
Does the K1 Mark II still make sense to buy today? Is there an Mark III in the works?
Posted By Serkevan
Replies: 134
Views: 9,399
*Raises hand. I did, too. If you aren't sure about how committed you will be, 200 stings far less than 1000. I, in fact, always recommend a second-hand older flagship when people ask... though many have quite a bit of apprehension regarding used stuff. My German friends are the ones who are happiest with it, the Spanish ones... not so much.
Search took 0.03 seconds | Showing results 1 to 25 of 300

 
Forum Jump


All times are GMT -7. The time now is 11:10 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top