Eric3456

Joined on Nov 29, 2013

Comments

Total: 28, showing: 1 – 20
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In reply to:

Eric3456: DSLRs use much less battery than the mirrorless cameras do and sometime that is very useful.

I went to a village in China during the 2018 Chinese New Year holidays. I needed to wake up early to take the train so I was so tired and forgot to bring the fully charged battery for my Pentax K-70. The battery in the camera was 75% full and I reduced battery usage by turning off the LCD screen and not checking the photos after taking them (just like shooting a film camera). I was able to take 239 photos (some with the built-in flash) in 10 days. The battery indicator sometime turned red but the battery was never depleted.

The CIPA Battery Life Rating for a Sony A7r III is 530 shots per charge. Getting 1300 photos per charge is surely an achievement by itself.

Link | Posted on May 24, 2019 at 08:14 UTC

DSLRs use much less battery than the mirrorless cameras do and sometime that is very useful.

I went to a village in China during the 2018 Chinese New Year holidays. I needed to wake up early to take the train so I was so tired and forgot to bring the fully charged battery for my Pentax K-70. The battery in the camera was 75% full and I reduced battery usage by turning off the LCD screen and not checking the photos after taking them (just like shooting a film camera). I was able to take 239 photos (some with the built-in flash) in 10 days. The battery indicator sometime turned red but the battery was never depleted.

Link | Posted on May 21, 2019 at 10:32 UTC as 25th comment | 6 replies
In reply to:

james s. kennedy: After 22 years in the Air Force, I spent 24 years as a Boeing software engineer. The last half of my career was on the F-22 stealth fight, which carried the equivalence of 2 Cray supercomputers, original design had 3. I was asked to study the feasibility of automated target recognition. I had all the necessary security clearances (my USAF career was largely spy satellites that used film), and I had long discussions with every involved key player I could find, Lincoln Labs, Sandra, Livermore Labs, USAF aeronautical systems. This was 1995. My conclusion was not in my lifetime, and maybe not in God's lifetime. Very frustrating since we humans can easily do it, tell our children apart, but no one knew how we did it. Now even very cheap digital cameras have face detection. How? Was the answer neural nets, which held the most promise back in 1995. I have been retired since 2005, and no security clearances.

I credit the Internet and the open source software like OpenCV for the rapid development. Anyone can access the source code to learn and be inspired.

Link | Posted on Mar 22, 2017 at 14:09 UTC
On article Throwback Thursday: the dual-lens Kodak EasyShare V570 (21 comments in total)

I almost got this camera but instead I bought the Pentax K-100D.

Link | Posted on Dec 15, 2016 at 13:53 UTC as 2nd comment
On article Video: Shooting Dog Portraits with the Sony a6300 (191 comments in total)

Are all these lenses full-frame?

Link | Posted on Nov 29, 2016 at 07:51 UTC as 193rd comment
On article Video: Shooting Dog Portraits with the Sony a6300 (191 comments in total)
In reply to:

Speedicut: Count me as one of those that finds the sponsored content hurting the credibility of the site. Didn't Amazon, the parent company, recently put an end to "sponsored" product reviews for credibility reasons? It's a fluff piece (heh) and as this becomes a bigger revenue stream it follows that DPR will pull punches in their reviews. The pieces are, "commissioned by the sponsor in conversations with our marketing team, and the sponsor paid for it to be produced." So it's a commercial, Sony hired them to do a commercial. Can a business be ad man one day and objective reviewer the next? It's fine to say "it's business, have to pay the bills". Well, this makes Sony a customer and isn't the customer always right? You don't bite the hand that feeds you.

And a big hurray for Motley Zoo and all no-kill shelters. Check out the great looking basenjis at 6m25s!

I think it's ok as long as the contents facilitate win-win-win.

Link | Posted on Nov 29, 2016 at 07:46 UTC
On article Action-packed: Sony a6500 review (1196 comments in total)
In reply to:

Eric3456: I am sure this is a great camera. But how come close down the F1.4 G Master lens to F4 and shoot at ISO6400? I am interested to know how the system performs with the lenses wide open. After all Sony is charging premium prices for the large aperture and gorgeous bokeh.

I understand, however, other sites use F2.8 for testing autofocus performance: http://takeshi0312.pixnet.net/blog/post/42979883-pentax-k-1%E3%80%90%E6%A5%B5%E9%99%90%E2%80%A7%E8%B6%85%E6%9A%B4%E5%8A%9B%E2%80%A7%E5%8B%95%E6%85%8B%E8%BF%BD%E7%84%A6%E6%B8%AC%E8%A9%A6%EF%BC%81%E3%80%91

I want to see similar shots for comparison.

Link | Posted on Nov 23, 2016 at 03:32 UTC
On article Action-packed: Sony a6500 review (1196 comments in total)

I am sure this is a great camera. But how come close down the F1.4 G Master lens to F4 and shoot at ISO6400? I am interested to know how the system performs with the lenses wide open. After all Sony is charging premium prices for the large aperture and gorgeous bokeh.

Link | Posted on Nov 22, 2016 at 15:58 UTC as 258th comment | 3 replies
On article Pentax K-1 Review (2663 comments in total)
In reply to:

Eric3456: In the Sony's a6300 autofocus test, the cyclist wears a red cap and a black shirt riding on a grey path. In this one the cyclist wears a white helmet and a white shirt riding on a grey path. As it may be easier to track a red object in this scenario, the results would only be comparable if the cyclist had wore the same clothing for the test.

All these tracking systems make use of feature recognition algorithms analyzing images captured by the RGB color matrix sensors. The colors or patterns of the images will affect the performance and reliability of the system. For example, just a few days ago a Tesla crashed during auto pilot because the tracking system was unable to distinguish the white truck from the bright sky. The Tesla probably would not have crashed had the truck been in red color.

Link | Posted on Jul 19, 2016 at 14:35 UTC
On article Pentax K-1 Review (2663 comments in total)

In the Sony's a6300 autofocus test, the cyclist wears a red cap and a black shirt riding on a grey path. In this one the cyclist wears a white helmet and a white shirt riding on a grey path. As it may be easier to track a red object in this scenario, the results would only be comparable if the cyclist had wore the same clothing for the test.

Link | Posted on Jul 9, 2016 at 08:51 UTC as 187th comment | 3 replies
On article Medium-format mirrorless: Hasselblad unveils X1D (1173 comments in total)
In reply to:

phoenix15: Look like Pentax K-01. Marc Newson always ahead of his time, just like what he did with Ikepod. Now, what pentax is going to do ?

Are they going to sue?

Link | Posted on Jun 23, 2016 at 02:52 UTC
On article What's missing? Ming Thein on the state of mirrorless (734 comments in total)
In reply to:

CameraLabTester: Nature and sports photographers can look through the viewfinder of a DSLR for many many hours and consume very little battery life.

If you use your chandelier to warm up the soup for dinner, you will have an astronomical electricity BILL.

.

That's the strength of a DSLR. Sometime when opportunity comes I don't even have time to read the exposure parameters - just focus and shoot, let alone changing battery or switching viewfinder. I have also heard that liveview can heat up the sensor and may cause more noise in images. However, I think EVF is good for video.

Link | Posted on Nov 7, 2015 at 08:41 UTC

Perhaps people are still happy with their 12/16MP DSLRs / cameras (I am one of them). I will upgrade for 4k video and better autofocus, but not for pixel count.

Link | Posted on Oct 29, 2015 at 10:18 UTC as 29th comment | 1 reply

Get it if you want your subjects look serious in your pictures.

Link | Posted on Oct 24, 2015 at 14:38 UTC as 25th comment
On article A lot to Leica? Hands-on with the Leica SL (Typ 601) (1494 comments in total)

It's Ok. It has 4k video.

Link | Posted on Oct 21, 2015 at 07:43 UTC as 267th comment | 1 reply

Recently I had some old film negatives (20 - 40 years old) scanned. They all have yellowish / greenish cast and I blamed myself for not storing the negatives in climate-controlled storage. So it is comforting to see that even with all those climate-controlled facilities NASA's film negatives have also turned yellowish.

Link | Posted on Oct 7, 2015 at 06:10 UTC as 21st comment | 1 reply

They've got self-aware

Link | Posted on Jul 10, 2015 at 02:57 UTC as 19th comment
On article Hands-on with the Pentax K-3 II (526 comments in total)
In reply to:

winkalman: For those lamenting the lack of a built in flash, why not just go with a small hotshoe flash that offers higher output and bounce capabilities like Metz's mecablitz 26 AF-1?

http://www.bhphotovideo.com/c/product/1100044-REG/metz_mz_2631796p_mecablitz_26af_1_digital_flash.html

Ever since I bought my Sigma 10-20 five years ago, I have used the built-in flash of my K-x for less than ten times. The lens blocks the flash and casts a shadow on the lower part of the pictures. Also the built-in flash is not strong enough to support high-speed flash sync. So I think the built-in flash is only good for compact lenses such as the kit lens or prime lenses. If one wants convenience, he could just carry a enthusiast compact. If one wants beautiful portrait shots with long lenses or ultra wide shots with people under beautiful clouds and blue sky, the built-in flash is not good enough

Link | Posted on Apr 24, 2015 at 10:43 UTC
In reply to:

jaxson: This selection works best for me.
Free Astrotracing for all!

Just add real wifi and drop flu card, add a 645z style floppy screen and for gods sake improve the video abilities with real sensor shift stabilisation and focus peaking/ digital zoom during video.

Free Astrotracing (y)

Link | Posted on Apr 23, 2015 at 07:16 UTC
In reply to:

Aur: "The other thing is heat. Because the sensor is always on, it generates heat. So with current technology we believe the time is not right for us to make a large sensor mirrorless camera. "

I wonder what this means for the longevity of a full frame mirrorless. They hint they ran into heat problems obviously, I know a Sony mirrorless can actually physically shut down in a hot climate when you've been shooting for a long time, especially with video, and Nikon has some patents to try to cool down the sensor. The camera will simply shut down to try to protect the sensor from the heat.

More heat = more noise. You can search for "cooled dslr" on the Internet. Some astro photographers add fans to their dslr to reduce noise during long exposure.

Link | Posted on Mar 9, 2015 at 16:03 UTC
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