jaad75

jaad75

Lives in United States United States
Joined on Sep 19, 2006
About me:

Pentax K10D
+ D-BG2 Battery Grip
+ Katz Eye Focusing Screen
+ O-ME53 Magnifying Eyecup
Lenses:
Pentax DA 10-17mm f/3.5-4.5
Pentax DA 12-24mm f/4
Pentax FA 31mm f/1.8 Limited
Pentax FA 35mm f/2
Pentax FA 43mm f/1.9 Limited
Pentax FA 50mm f/1.4
Pentax FA 77mm f/1.8 Limited
Pentax D-FA 100mm f/2.8 Macro
Voigtlander 125mm f/2.5
Pentax DA* 200mm f/2.8
Lighting:
Pentax AF-540 FGZ
Nikon SB-25 (2)
Nikon SB-26 (4)
Pocket Wizard PLUS II (3)
Westcott Apollo 28
Westcott Halo
Impact Umbrellas & Stands
Honl Photo & Lumiquest Modifiers

Comments

Total: 18, showing: 1 – 18
On Hands on with the Pentax 645Z news story (528 comments in total)
In reply to:

Absolutic: how much bigger is the sensor vs the normal 36mm by 24mm full frame sensor?

there was no format where the actual frame size was 60x45mm. 120 film was 56×41.5mm and as I told before "fullframe" MF sensor is 53.9x40.4mm.

Direct link | Posted on Apr 15, 2014 at 08:29 UTC
On Hands on with the Pentax 645Z news story (528 comments in total)
In reply to:

Absolutic: how much bigger is the sensor vs the normal 36mm by 24mm full frame sensor?

Fullframe MF sensor is 53.9x40.4mm, the one used here have a popular 1.3x crop factor.
And comparing to 36x24:
http://i1266.photobucket.com/albums/jj524/picrumors/picrumors001/ff_vs_sony50mp_medium_zps7c17fabd.jpg

Direct link | Posted on Apr 15, 2014 at 08:14 UTC
In reply to:

Amateurbob: My comments on the Pentax K50,500 samples has evoked quite an emotional response. The reply that the Pentax has the same sensor as the Sony cameras may be true. But even in DPreview tests nowhere does a newer Petax DSLR such as the K-30 or K-5 match any Sony DSLR or Nex in dynamic range. What is Pentax doing with those Sony sensors? Reading the comments what seems to be more important is the camera coming in bubblegum machine colors. What audience is Pentax aiming at? Pentax SLRs were my camera of choice in the days of film. I have several Pentax lenses from film days I would like to use on a Pentax DSLR. I am frustrated that Pentax does not make a DSLR that can match my non-DSLR Sony Nex C3. Especially when I am told Pentax uses Sony sensors. DPreview should put a DSLR Pentax up against other DSLRs in real world samples, particularly where blown out highlights are of concern. Nothing against the Space Needle but a day hike in the Olympics would be a good place to take the samples.

Every Pentax camera with IMX-071 sensor have better dynamic range than Sony cameras with the same sensor. In case of K-5/II/IIs it is much better because of14-bit RAW, but even 12-bit K-30 or K-01 beat Sony's implementations (no matter NEX or SLT) . Check out DxO tests.

Direct link | Posted on Jun 13, 2013 at 22:39 UTC
On Sigma 18-35mm F1.8 DC HSM Preview preview (352 comments in total)
In reply to:

sportyaccordy: The more I look at this lens the less sense it makes. It should have been a <20mm 1.8 prime

I love my NEX C3 but DX just can't compete with FX in the realm of speed. This whole exercise is a testament to the futility of it all. Better to stick with cheap glass and focus on better utilizing sensors. I forget which company it was that came out with those security camera sensors that were like ISO6553600. They could implement tech on APS-C sensors that would be cost prohibitive on FX sensors to cover the gap.

I mean I have been playing with an aperture equivalence calculator. f/2 on FX is like f/1 on DX. There is no comparison.

Definitely not. F/2 on FX has the same DoF as ~f/1.4 on DX. And f/1.8 on DX has slightly narrower DOF than f/2.8 on FX when using equivalent focal length.

Direct link | Posted on Apr 28, 2013 at 23:32 UTC
On Review in Progress: Pentax K-5 II and K-5 II S article (70 comments in total)
In reply to:

minturnino: I have an K-5 and I'm not happy to the AF accurance even outdoors.
The AF module of the K-5 is unstable especially on white surfaces.
For this reason I was thinking of buying a K-5II.
Percentage with which you can take pictures in focus by using the K-5II?
There's really an more AF accurance/Improved in low light?
Thanks

Something went wrong with those links - here we go again - K-5IIs and K-5II:
http://translate.google.pl/translate?hl=en&sl=pl&tl=en&u=http%3A%2F%2Fwww.optyczne.pl%2F211.3-Test_aparatu-Pentax_K-5_IIs__U%25C5%25BCytkowanie_i_ergonomia.html

K5II and K-5:
http://translate.google.pl/translate?hl=en&sl=pl&tl=en&u=http%3A%2F%2Fwww.optyczne.pl%2F208.3-Test_aparatu-Pentax_K-5_II_U%25C5%25BCytkowanie_i_ergonomia.html

Both are compared to Sony and Nikon as well.

Direct link | Posted on Apr 22, 2013 at 00:12 UTC
On Review in Progress: Pentax K-5 II and K-5 II S article (70 comments in total)
In reply to:

minturnino: I have an K-5 and I'm not happy to the AF accurance even outdoors.
The AF module of the K-5 is unstable especially on white surfaces.
For this reason I was thinking of buying a K-5II.
Percentage with which you can take pictures in focus by using the K-5II?
There's really an more AF accurance/Improved in low light?
Thanks

They compared K-5II and the original K-5 before:

http://translate.google.pl/translate?hl=en&sl=pl&u=http://www.optyczne.pl/211.4-Test_aparatu-Pentax_K-5_IIs__Rozdzielczo%25C5%259B%25C4%2587.html&prev=/search%3Fq%3Dhttp://www.optyczne.pl/211.4-Test_aparatu-Pentax_K-5_IIs__Rozdzielczo%2525C5%25259B%2525C4%252587.html%26client%3Dfirefox-a%26hs%3DIFS%26rls%3Dorg.mozilla:en-US:official&sa=X&ei=lYtuUduwB4nJtAbc3oDoDg&ved=0CDMQ7gEwAA

I don't think they tested the best copy of the K-5, though.

Direct link | Posted on Apr 21, 2013 at 22:46 UTC
On Review in Progress: Pentax K-5 II and K-5 II S article (70 comments in total)
In reply to:

minturnino: I have an K-5 and I'm not happy to the AF accurance even outdoors.
The AF module of the K-5 is unstable especially on white surfaces.
For this reason I was thinking of buying a K-5II.
Percentage with which you can take pictures in focus by using the K-5II?
There's really an more AF accurance/Improved in low light?
Thanks

My K-5 is pretty accurate, but K-5IIs is still better, and in a low light is MUCH better (as I wrote before I have misfocused shots level close to zero - let's say less than 10 for over 200 shots). Here you have pretty decent AF accuracy test, done by the guys behind the LensTip - just scroll down to the autofocus section (Google translated):

http://translate.google.pl/translate?hl=en&sl=pl&u=http://www.optyczne.pl/211.4-Test_aparatu-Pentax_K-5_IIs__Rozdzielczo%25C5%259B%25C4%2587.html&prev=/search%3Fq%3Dhttp://www.optyczne.pl/211.4-Test_aparatu-Pentax_K-5_IIs__Rozdzielczo%2525C5%25259B%2525C4%252587.html%26client%3Dfirefox-a%26hs%3DIFS%26rls%3Dorg.mozilla:en-US:official&sa=X&ei=lYtuUduwB4nJtAbc3oDoDg&ved=0CDMQ7gEwAA

Direct link | Posted on Apr 21, 2013 at 22:45 UTC
On Review in Progress: Pentax K-5 II and K-5 II S article (70 comments in total)
In reply to:

Timmbits: lAthough they are following a trend (no OLPF), they clearly do not possess the sensor to do that. The moiré is rather significant.

There was a couple of filterless cameras before D800E...

Direct link | Posted on Apr 18, 2013 at 10:42 UTC
On Review in Progress: Pentax K-5 II and K-5 II S article (70 comments in total)
In reply to:

halai: As an owner of the K-5, I would like to see the AFC comparison of the two cameras. I have kids so would love to see if Pentax improved on this segment.

Thanks DPR!

@DStudio - I didn't even bother to check the regular mode, cause the expanded AF area mode works great and I left it on for good... :)

Direct link | Posted on Apr 18, 2013 at 10:40 UTC
On Review in Progress: Pentax K-5 II and K-5 II S article (70 comments in total)
In reply to:

DarylK: Not a big deal, but as the owner of a K-5, I'd be interested to see if the image quality is much different/improved between an old K-5 and the new K-5II.

@DStudio - I compared max shutter speeds I can hold with the SR on and off. I've done about hundred exposures on different focal lenghts.

Direct link | Posted on Apr 18, 2013 at 10:37 UTC
On Review in Progress: Pentax K-5 II and K-5 II S article (70 comments in total)
In reply to:

Pete: I agree with previous posts re: FF/BF issues. In certain situations, the K-5 struggles. Even, in some cases, in the same light, but if one person is more tan than another. I see some this in stage-lighting situations. If the II series addresses that, in all honesty, that would be a phenomenal camera. That occasional issue is my main gripe with the K-5.

I've done many more shows with K-5 than with K-IIs, but what is the most noticeable, beside of AF speed in a low light, is the number of misfocused shots - it's close to ZERO with IIs, while it was up to 20-30% with K-5.

Direct link | Posted on Apr 17, 2013 at 21:36 UTC
On Review in Progress: Pentax K-5 II and K-5 II S article (70 comments in total)

"In low light, the difference is a bit less obvious"
Are you kidding? It's a low light where the difference is HUGE. It's not only the speed difference (K-5II slows down in much lower light than the original K-5 did), but the accuracy which is the best in this class of equipment.

Direct link | Posted on Apr 17, 2013 at 20:36 UTC as 11th comment
On Review in Progress: Pentax K-5 II and K-5 II S article (70 comments in total)
In reply to:

halai: As an owner of the K-5, I would like to see the AFC comparison of the two cameras. I have kids so would love to see if Pentax improved on this segment.

Thanks DPR!

Yes they did. I use that new expanded AF area mode (introduced with K-30) and it works better with moving subjects.

Direct link | Posted on Apr 17, 2013 at 20:31 UTC
On Review in Progress: Pentax K-5 II and K-5 II S article (70 comments in total)
In reply to:

jf_tea: The low-lights issues...
Have they been resolved ?
Really?
The two original K5 that I have used have problems with extreme front focusing under yellowish low-light: Tunsgten (indoor and some flood lights outdoors) and Sodium (street lamps).
*** I wish Pentax offered owners the option of upgrading the AF module ! ***
Otherwise, the K5 is fine under sunlight (even dusk) and bright light, or blueish low light (mercury lamps).

They have been resolved completely. But they weren't that pronounced with a good copy of original K-5 as well. Original K-5 just could not focus in such a low light as K-5II can and slowed down noticeably when light levels were between EV4-EV3 where K-5II keeps that regular speed to EV2-EV1. There is a great improvement with AF accuracy as well.

Direct link | Posted on Apr 17, 2013 at 20:28 UTC
On Review in Progress: Pentax K-5 II and K-5 II S article (70 comments in total)
In reply to:

Almeida: So it doesn't seem worth the hassle...

K-30 has a different AF sensor (SAFOX IX) and it's definitely not as good as the new SAFOX X. I have both K-5 and K-5IIs and that update was definitely worth it.

Direct link | Posted on Apr 17, 2013 at 20:17 UTC
On Review in Progress: Pentax K-5 II and K-5 II S article (70 comments in total)
In reply to:

DarylK: Not a big deal, but as the owner of a K-5, I'd be interested to see if the image quality is much different/improved between an old K-5 and the new K-5II.

There is absolutely no improvement in SR results - it's about 2.5-2.66EV just as it was with original K-5

Direct link | Posted on Apr 17, 2013 at 20:13 UTC
On Preview:pentax-k-30 (244 comments in total)
In reply to:

jaad75: K-5's RAW buffer is at least 23 RAWs.

I know, but there is an obvious mistake in the preview.

Posted on May 21, 2012 at 22:28 UTC
On Preview:pentax-k-30 (244 comments in total)

K-5's RAW buffer is at least 23 RAWs.

Posted on May 21, 2012 at 22:14 UTC as 117th comment | 4 replies
Total: 18, showing: 1 – 18