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Forum: Pentax Forums Giveaways 09-07-2016, 03:00 PM  
PF 10th Anniversary - Pentax K-50 1-Day Giveaway! - Entries closed, winner announced.
Posted By jms698
Replies: 1,825
Views: 58,563
Nice giveaway. Good luck everyone
Forum: Pentax Forums Giveaways 12-13-2014, 05:27 PM  
3 Million Post Giveaway: Confirm your entry!
Posted By jms698
Replies: 2,854
Views: 90,209
Confirming my entry. May the luckiest poster win :)
Forum: Pentax Forums Giveaways 12-11-2014, 12:40 AM  
Win an FA 31mm Ltd: PF 3 million post giveaway!
Posted By jms698
Replies: 2,237
Views: 111,453
Great contest. I look forward to congratulating the lucky winner.
Forum: Photographic Industry and Professionals 05-21-2012, 10:48 PM  
K-30 or K-5
Posted By jms698
Replies: 21
Views: 3,605
If you had to choose between the K-5 or the new K-30, which would you pick and why? Both seem pretty much the same size and have very similar specs.

K-5 advantages:
- Stereo mic port
- Metal body
- better battery life

K-30 advantages:
- better AF
- AA battery option
- ??
Forum: Pentax News and Rumors 02-10-2012, 03:10 PM  
K-mount lenses specifically designed for the K-01
Posted By jms698
Replies: 75
Views: 10,890
The above sounds like a good idea to me, but how about this:

Assuming the rear element is long enough that it bumps up onto the mirror. Pentax could add a pin that prevents mounting on older cameras. The lens mounts fine on the K-01, as there is nothing in the way of the pin. However, on all future DSLRs Pentax could make it so the pin pushes into a mechanism that physically pushes the mirror up. Kind of like a mirror lock up button triggered by a pin. When you insert a K-01 lens e.g. into a K-3 body the mirror automatically flips out of the way (even when the camera is off) and you can only use live view mode for taking pictures.

How does that sound? Plausible solution?
Forum: Pentax Compact Cameras 09-24-2011, 01:16 PM  
Idea: Mirrorless K-mount with telescoping mount
Posted By jms698
Replies: 12
Views: 3,612
Hi forum members,

Probably the main reason why making a mirrorless version of an existing D-SLR mount is the flange distance required between the sensor and the lens. The lens has to be so far away from the sensor, that the body can't be be much tinned than existing SLR bodies, negating the size advantage offered by getting rid of the mirror.

So, how about this idea: Pentax should make a thin mirrorless camera, that uses the standard k-mount and keeps the existing flange distance. It can do this by using a telescoping mechanism on the mount. The mount could retract when the camera is off, creating a really slim body for carrying the camera. Then, when you turn on the camera, the mount and attached lens could extend out the the proper distance, ready for taking the picture.

It would certainly take some clever engineering to get this kind of mechanism working nicely, but Pentax has some great engineers. I'm sure they could pull it off.

What do you think?
Forum: Pentax DSLR Discussion 09-21-2011, 10:08 PM  
Why is the K-5 heavier than the K-r?
Posted By jms698
Replies: 31
Views: 4,163
The K-5 (without battery) weighs 670 g (1.4 lb)
The K-5 (with battery) weighs 750g (1.6 lb).

The K-r without battery weighs: 515g (18.2 oz)
The K-r (with D-LI109 battery) weighs 598g (20.5 oz)
The K-r (with AA batteries) weighs approx 625g (22 oz)

So, disregarding the heavy weight of AA batteries, the K-5 is about 150g heavier than the K-r, both with and without batteries.

My question is "why"?

Is weather sealing and a larger prism that much heavier?

I'd really love to see an SLR that is both fully featured and really light. Wondering if such a thing is possible...
Forum: Pentax SLR Lens Discussion 12-08-2010, 05:27 PM  
Alternative lens cap for the 70mm f/2.4 limited?
Posted By jms698
Replies: 2
Views: 1,960
I just got a Pentax 70mm f/2.4 limited lens. I can't wait to try it out.

One question though: the screw on lens hood + cap is nice, but seems like a waste of space indoors when I'm not concerned about glare. I can take it off, of course, but then I don't have a place to attach the lens cap anymore. I certainly want to protect the lens with a cap whenever possible, so does that mean I need to keep the hood on all the time, too, or are there alternatives?

The screw on thread looks like it might support other kinds of snap-on lens caps.
Has anyone tried this? What alternative lens caps do you recommend for a 70mm lens when going without the lens hood?
Forum: Photographic Technique 10-27-2010, 07:20 PM  
Open letter to the Major Camera Manufacturers by Lumionus Landscape
Posted By jms698
Replies: 52
Views: 9,367
Does this light-loss thing only apply to lenses with very big apertures? I'm wondering what practical difference there will be between a 77mm f/1.8 and a 70mm f/2.4 lens in terms of t-stop loss at the sensor-level. Probably none significant, right?
Forum: Pentax News and Rumors 09-12-2010, 06:53 PM  
What about a K300d?
Posted By jms698
Replies: 40
Views: 6,337
The problem with the K-7 is it's relatively poor high-iso performance. Argueably worse even than the K20d. I'd love a K-r with it's great high-iso but also with WR.

Oh well, I guess I'll wait until next year until the price of the K-5 comes down. Or maybe pentax will soon come out with a model between the K-r and K-5.
Forum: Pentax News and Rumors 09-10-2010, 07:03 PM  
What about a K300d?
Posted By jms698
Replies: 40
Views: 6,337
With all the talk of the K-r and K-5 there seems to be a gap in Pentax's offering. Where is the mid-range camera successor to the K200d. A K-r would suit my need just fine (upgrading from a K20d for better high-iso and AF), but I sure which it had weather sealing. A K300d model would fill that gap quite nicely.

Has anyone heard anything about such a model?
Forum: Pentax News and Rumors 08-22-2010, 10:33 PM  
Any chance of Limited lenses with SDM?
Posted By jms698
Replies: 60
Views: 10,516
I'm wondering if there are going to be Limited-series "pancake" lenses with SDM autofocus. It seems kind of backwards to use screwdriver AF on modern lenses like them. Is there any good technical reason not to equip them with SDM? Pentax could release DA* Limiteds with SDM and weather sealing. I'd certainly buy such lenses.

What do you think?
Forum: Pentax News and Rumors 04-21-2010, 04:28 PM  
Bluetooth Please
Posted By jms698
Replies: 20
Views: 4,734
If Pentax had an iPhone app that can be used to remote control their cameras that would be a major "cool" feature. Certainly something to distinguish them from Canikon. I'd say they should invest in this.

Bluetooth is probably sufficient to remote control, with wifi only needed for remote live view. I'd be happy with bluetooth for now. Maybe a version two product could also support remote control of flashes via bluetooth/wifi.
Forum: Pentax SLR Lens Discussion 03-03-2010, 04:10 PM  
85mm,F1.4 portrait lense
Posted By jms698
Replies: 23
Views: 3,778
Personally, I'm keenly awaiting the Sigma 85mm f/1.4. But price might somewhat reduce my keenness. I can't afford an arm and a leg either. I'd be happy with an 85mm f/2 (with fast and silent AF).
Forum: Pentax News and Rumors 02-28-2010, 07:38 PM  
Rumor: 5 new Sigma lenses
Posted By jms698
Replies: 122
Views: 26,250
The amount of interest in the Sigma 85mm f/1.4 (I want one too!!) sure goes to show what an opportunity Pentax has left lying on the table for so long. If only they had released an updated 77mm with SDM, or a 90mm Limited f/2.0, or any kind of fast new prime between 70mm and 200mm. So, now everyone buys from Sigma instead. Oh well. Pentax's loss...
Forum: Pentax SLR Lens Discussion 02-15-2010, 03:23 PM  
Best lenses for video with K-7
Posted By jms698
Replies: 0
Views: 1,508
I'm wondering which lenses people consider best for capturing video with the K-7. I don't have a K-7, but I am considering getting one (or the K-8 when it comes out) and want to make sure any lenses I buy will also work well for video.

Questions:
  • Zoom or Prime?

  • 70mm or 77mm for video (the age old debate, but maybe the choice is clearer, if video is a concern)?

  • Best aperture to capture video at?

  • Can the K-7 autofocus while capturing video?

  • SDM vs. Screwdriver motor (focus motor sound could obvious be a problem, but is there any issue besides this - like smoothness of the focus movement)?


Thanks for any insights.
Forum: Photographic Technique 02-02-2010, 03:27 PM  
how to create a moon-light style lighting effect indoors?
Posted By jms698
Replies: 17
Views: 9,835
Can you please explain? How is light from a flash different from a flood lamp or LED flashlight?
Forum: Photographic Technique 02-02-2010, 01:50 PM  
how to create a moon-light style lighting effect indoors?
Posted By jms698
Replies: 17
Views: 9,835
Wow, thanks for all the good advice so far.



So, for example, I might use a Pentax AF360 flash (gelled to blue) off camera and as far away from the scene as possible. Maybe also zooming the flash to maximum focal length (as opposed to wide-angle mode)?
Forum: Photographic Technique 02-01-2010, 08:40 PM  
how to create a moon-light style lighting effect indoors?
Posted By jms698
Replies: 17
Views: 9,835
Good idea! I hadn't thought of that.

Is there any white balance tweaking or other post-production that you can recommend?
Forum: Photographic Technique 02-01-2010, 06:17 PM  
how to create a moon-light style lighting effect indoors?
Posted By jms698
Replies: 17
Views: 9,835
I'm trying to create a moody moon-light style lighting effect in an indoor shoot (darkened room).

I want to make it look like a moon-light night, but at the same time also want to show clear details in all the people in the room. Definitely not silhouette. I also want enough light to be able to use a reasonably fast shutter speed - something like 1/30 - without pushing the ISO beyond 1100.

I'm imagining something like movie "night" lighting that simulates night without sacrificing detail and providing enough light for the cameras to record the action.
Can anyone suggest a way to achieve such a lighting effect? Are there cheap ways to achieve it, without requiring a full studio setup?

Thanks for any information and/or example shots.
Forum: Pentax SLR Lens Discussion 01-10-2010, 07:07 PM  
What happened to the 18-250mm?
Posted By jms698
Replies: 13
Views: 1,963
I wonder if Pentax will create a rebranded version of the new Tamron 18-270mm...
Forum: Pentax SLR Lens Discussion 01-10-2010, 05:37 PM  
What happened to the 18-250mm?
Posted By jms698
Replies: 13
Views: 1,963
I was thinking of buying the Pentax/Tamron 18-250mm f/3.5-6.3 lens.

But when I looked at amazon, bhphotovideo, and adorama it doesn't seem to exist anymore. Even Pentax's own site's "buy" link doesn't work:
Camera Lens - Official PENTAX Imaging Web Site

Does anyone know what happened to the lens? Why has it mysteriously vanished?
Forum: Pentax News and Rumors 01-10-2010, 04:25 PM  
Pentax Prediction 2010
Posted By jms698
Replies: 47
Views: 15,963
I'm hoping for some more affordable primes. Something with good image quality, but otherwise no-frills. E.g. a 50mm f/2 and 85mm f/2.

There was also talk of a 150mm f/2.8 Limited somewhere on this forum.

+1 for a K-7 with better high-ISO quality
Forum: Pentax News and Rumors 10-09-2009, 02:26 PM  
So... What's this I hear about a new 135mm Limited?
Posted By jms698
Replies: 67
Views: 10,615
I'd love to see a 135mm prime from Pentax. I'd probably buy anything with a focal length from 90mm to 150mm and an aperture faster than f/2.8. If it is f/2.8 or slower, no point. Just get the 50-135mm DA*. Small size is, of course, desirable, but I'd rather have an SDM focus motor than a super-compact form-factor. Maybe a semi-limited, small but not pancake ;)

Something like 108mm f/2 would be very nice ...
Forum: Pentax SLR Lens Discussion 08-24-2009, 02:23 PM  
Flash prime lens between 80 and 150mm?
Posted By jms698
Replies: 12
Views: 1,572
"Flash" is a type, sorry. Please ignore that word in the post title.

However, you are right in that I'm not looking for a manual lens.
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