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 article Special K? Pentax K-1 First Impressions Review (978 comments in total)
In reply to:

jaad75: You are wrong on -3EV sensitivity. Those 3 center points have f/2.8 PRECISION, and all 25 cross-type points are sensitive down to -3EV.
Source:
http://www.ricoh-imaging.co.jp/english/products/k-1/feature/02.html

"Light metering measured at ISO 100 and with a 50mm F1.4 lens; focusing measured at ISO 100, at room temperature and with 25 middle sensors"

Did you speak to Ricoh Japan directly? The K-5II/K-5IIs, K-3/K-3II and K-S2 have all points sensitive down to -3EV. The K-1 appears to have the same module as the K-3 (those additional 6 points were previously inactive) with different optics to get a wider frame coverage.

Link | Posted on Feb 18, 2016 at 20:30 UTC
On article Special K? Pentax K-1 First Impressions Review (978 comments in total)

You are wrong on -3EV sensitivity. Those 3 center points have f/2.8 PRECISION, and all 25 cross-type points are sensitive down to -3EV.
Source:
http://www.ricoh-imaging.co.jp/english/products/k-1/feature/02.html

"Light metering measured at ISO 100 and with a 50mm F1.4 lens; focusing measured at ISO 100, at room temperature and with 25 middle sensors"

Link | Posted on Feb 18, 2016 at 09:48 UTC as 108th comment | 4 replies
In reply to:

Hartin: I'd really like a canon/nikon style joystick or direction pad to move the AF point. The last piece missing to have perfect ergonomics. Or at least a touch screen, that's also a great way to select af point.

Yeah, right...:P Especially when you have a heavy telephoto lens attached and you have to change the ISO manually...:D

Link | Posted on Feb 12, 2015 at 16:12 UTC
On article Hands on with the Pentax 645Z (707 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.

Link | Posted on Apr 15, 2014 at 08:29 UTC
On article Hands on with the Pentax 645Z (707 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

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.

Link | Posted on Jun 13, 2013 at 22:39 UTC
On article Review in Progress: Pentax K-5 II and K-5 II S (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.

Link | Posted on Apr 22, 2013 at 00:12 UTC
On article Review in Progress: Pentax K-5 II and K-5 II S (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.

Link | Posted on Apr 21, 2013 at 22:46 UTC
On article Review in Progress: Pentax K-5 II and K-5 II S (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

Link | Posted on Apr 21, 2013 at 22:45 UTC
On article Review in Progress: Pentax K-5 II and K-5 II S (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...

Link | Posted on Apr 18, 2013 at 10:42 UTC
On article Review in Progress: Pentax K-5 II and K-5 II S (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... :)

Link | Posted on Apr 18, 2013 at 10:40 UTC
On article Review in Progress: Pentax K-5 II and K-5 II S (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.

Link | Posted on Apr 18, 2013 at 10:37 UTC
On article Review in Progress: Pentax K-5 II and K-5 II S (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.

Link | Posted on Apr 17, 2013 at 21:36 UTC
On article Review in Progress: Pentax K-5 II and K-5 II S (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.

Link | Posted on Apr 17, 2013 at 20:36 UTC as 11th comment
On article Review in Progress: Pentax K-5 II and K-5 II S (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.

Link | Posted on Apr 17, 2013 at 20:31 UTC
On article Review in Progress: Pentax K-5 II and K-5 II S (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.

Link | Posted on Apr 17, 2013 at 20:28 UTC
On article Review in Progress: Pentax K-5 II and K-5 II S (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.

Link | Posted on Apr 17, 2013 at 20:17 UTC
On article Review in Progress: Pentax K-5 II and K-5 II S (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

Link | Posted on Apr 17, 2013 at 20:13 UTC
Total: 18, showing: 1 – 18