uwleahcim

Joined on May 17, 2015

Comments

Total: 32, showing: 1 – 20
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In reply to:

Biowizard: Which photographer on this planet needs to feed so much energy into a display to show 240 images a second? For PHOTO work, AND for VIDEO (the two things I thought DPReview was all about), a 240Hz display is UTTERLY unimportant.

LCD ad OLED don't flicker. The pixel is latched and doesn't fade. The main reason modern displays "flicker" is due to PWM dimming.

240Hz reduces input lag and smooth motions.

Link | Posted on May 11, 2022 at 00:30 UTC

Where is the Green Monster in the lens cellar?

Link | Posted on May 6, 2022 at 00:23 UTC as 6th comment

GoPro should have expanded more into such areas. With the older GoPro Hero 4 Black, they had a hero bus that allowed the cameras to integrate into complex rig systems. The hero bus allowed one to accurately sync the cameras and adjust camera settings.

Examples include 8k 360 GoPro Omni, Google/GoPro 3D 360 ODYSSEY, Google Light Field, GoPro stereo 3D. There are also plenty of bullet time rigs built using arrays of GoPros and the hero bus.

The bus communication still exists on the newer GoPro, but GoPro freaking locked everything up (probably to sell their overpriced accessories). As a result, the development of multi GoPro rigs is all but dead now.

Link | Posted on Oct 18, 2020 at 04:59 UTC as 7th comment
In reply to:

rgs_45: Now, I can't wait what DJI Action will come out to counter this. They made one with front LCD now GoPro made one. Maybe DJI Action will come out with a bigger sensor, 1" maybe??

I got the DJI Action because of the front LCD, it was on sale for around $250.00 with 3 batteries.

Problem with 1” sensor is the hyper focal distance is noticeably far even at F3.2 (Insta 360 One R). Large sensors coupled with fast lenses will definitely need some kind of AF system.

Thus I don’t see action cameras jumping to large sensors anytime soon.

Link | Posted on Sep 16, 2020 at 18:14 UTC
On article Canon RF 800mm F11 IS STM sample gallery (471 comments in total)
In reply to:

The Silver Nemesis: If you want this focal range and feel comfortable with f/11 - fine. I don’s say it’s a bad lens, but I’m afraid limitations will be quickly visible for someone used to big whites.

I’m pretty sure someone driving a BWM M5 will be smitten with driving a Honda NSX...

Link | Posted on Aug 11, 2020 at 00:06 UTC
In reply to:

Coomer: No 8k?

I was hopping for 6k. With 6k you can downsample to 4K for better 4K. You can make minor adjustments (rotation, crop, digital stabilization) without losing much quality for final 4K video. Finally 6k requires 24MP sensor, which yields a decent shooter.

Link | Posted on Jul 28, 2020 at 14:57 UTC
In reply to:

shademaster: Could you guys please quote the effective aperture for the cellphone/cameras? I know that if you tell me its f/1.7 and it's a 1/2.55 sensor, I can backward engineer it, but, I've got to convert in to mm and remember the dimensions of a "full frame" sensor and remember whether the 1/2.55 refers to the diagonal or the horizontal or whatever.... If you just said "effective f/8" that would be nice.

I know that effective aperture doesn't mean everything, especially since the phones have better sensor tech and the software does "magic", but it's another simple metric to help compare.

f/1.7 on cellphone camera is same as f/1.7 on FF in terms of light. There is no need for conversion calculations for exposure levels.

What you might be thinking of is depth of field.

Link | Posted on Oct 17, 2019 at 16:39 UTC
In reply to:

Petka: A sensor which can not clip would certainly be wellcome, but actually there is not much use for bigger dynamic range sensors that what we already have, about 15 stops at best. That is because no lens can pass even that amount of dynamic range due to internal reflections. Cleanest and clearest lenses with best anti reflection coatings are able to make images with about 12-13 stops of dynamic range at best. Newest expensive high speed glass is not making things better, because the number of lenses, thus lens surfaces, is getting higher not less, which is counterproductive what comes to DR.

The beauty is that you don't have worry about ever over exposing.

Allows one to shoot wide open all the time.
Allows one to shoot slow shutter all the time.
Eliminate the need for ND filters.

The only problem is this solution requires logic at every pixel. It would extremely expensive to implement. At the very least you'll need millions of counters. Heck, we can't even get global shutters, so I don't suspect this will ever be implemented soon.

Link | Posted on Oct 13, 2019 at 13:19 UTC
In reply to:

jy21: I tired a 360 camera for a while and view the results was too much of a hassle and not worth the benefits. At least for me.

The workflow was just too tedious. Using the camera was tedious. Image quality was merely ok.

Link | Posted on Sep 24, 2019 at 12:17 UTC
In reply to:

zephyrprime: Very impressive improvements. I'm not so sure about the super wide angle lens though. I have some very wide angle lenses for my big camera and I never use them. ILC camera makers really need to catch and implement computation techniques to their cameras. Things like night mode using multiframe rendering is missing from ilc even though some cheaper point and shoots have them. Semantic rendering and depth maps will be required for the future.

I don’t think big camera need to do computational photography on the spot. What they should do is build in computational analyzers to get you the shots and organize them for convenient processing later.

Current existing example is eye-af which is computational based auto focus to get you the shot.

Hypothetical night sight will be the camera recognizing a dark scene and taking series of bracketed shots automatically (and a count for motion). Then when you load the images onto a computer, it will start processing everything. Current method is tedious as you have to manually shoot brackets and individually mask out bad shots (like motion blur).

Link | Posted on Sep 20, 2019 at 16:24 UTC
In reply to:

IamToddNorris: I wish ILCs innovated as fast as these phone cameras.

The smart phone has replaced phones, p&s cameras, calculators, mp3 players, address books, computers, pen, paper, voice recorders and GPS devices. I can't even get 24p on canon's latest camera much less take a photo in complete darkness.

We live in weird times...

You can definitely take photos in complete darkness with your canon. You just don’t have all the computational automation to make image usable on the camera itself (you’ll have to use a computer plus software). Shooting deep space objects is possible with a Canon (with a lot of shots and time and processing), but you can’t do it with any smart phone yet.

Link | Posted on Sep 20, 2019 at 16:18 UTC
In reply to:

wcan: This is all impressive stuff, but let's not forget: All camera phones are fundamentally severely limited by a phone's form factor which demands a tiny sensor and a tiny lens.

Problem is data through put. We won’t be seeing real time computational photography on 60MP 14bit. Same reason we don’t see much computational videography (just too much data to process on the go)

Link | Posted on Sep 20, 2019 at 16:12 UTC
In reply to:

cosinaphile: 5g is an unwanted standard .... no one is complaining of 4g issues or problems
download occur quickly content streams well

5g will only really be necessary to over connect appliances and cars to the sensory
aspects of quick shared ai and advanced gps etc for self driving trucks and cars
it will aid in sharing the huge amounts of data from idiot camera doorbell owners to share with pseudo military police and other ghouls primordially interested in surveillance , and generally aid in spying on the population in real time
It is little needed by the avg person, is currently being banned in enlightened freedom loving cities, and where the scourge will eb installed , it will subject users and non users to unacceptable levels of cancer causing, health damaging radiation.
It will require low lying cell "towers" on light poles and other lower perches, and require many more units for coverage to be effective bringing people and radiation emitters unacceptably close to each other.

If you’re so worried about EM radiation from 5G, just cover yourself in tin foil.

Link | Posted on Sep 7, 2019 at 18:07 UTC
In reply to:

kennedy32: we want a new big 1" sensor!!!!

I’ll settle with a 1/1.33”, 1/1.5”, 1/1.7” sensor. Anything bigger than 1/2.3” will be a big improvement.

Link | Posted on Aug 15, 2019 at 17:23 UTC
In reply to:

sibuzaru: did he explained why he didn't want to just use a standard PVC pipe?

Because it would not make for an interesting article. If the guy wanted electronic communications to the lens (for aperture control, etc.) , he can add a long ribbon cable to pass the signals. Also, a PVC pipe would require the inside to be treated with anti-reflective coating (like black felt).

Link | Posted on Aug 8, 2019 at 17:56 UTC
In reply to:

OlHeath: Only upgrade for video seems to be eye AF, which is big, don't get me wrong. But it's still 8 bit, still 4k 30, no mention of removing the 29 min recording limit so we can assume it still has it, no improvement in bit rate across the board, and no flip screen. Sure, maybe Sony is about to release a video monster, the 7siii, but this now compares quite poorly to the video options of its competitors - Fuji, Nikon, Panny...

Come on Sony, release the damn S3!!

The minute recording limit is to bypass tariffs. Basically tariffs for photo cameras is cheaper than video cameras. If your camera can record video for longer than 30 minutes, its consider a video camera.

Link | Posted on Jul 16, 2019 at 16:52 UTC
In reply to:

AbrasiveReducer: Since it doesn't cost a cent to copy the Arca standard it's amazing this has taken so long. This looks good if there's no plastic. Since they're under the same roof, maybe Gitzo will get the memo as well.

This looks Just like the clamp found on gitzo ball heads.

Link | Posted on Jul 6, 2019 at 05:06 UTC
In reply to:

Mike FL: Is APPLE the best? May be,

Is APPLE secure? Let's see:

Arrested Huawei CFO/future CEO/founder's daughter tells you how to select secure network connected devices:

"Even Huawei’s CFO wouldn’t carry Huawei products, opting for Apple instead" upon arrested
https://9to5mac.com/2019/03/23/even-huaweis-cfo-didnt-want-to-carry-huawei-products-opting-for-apple-instead/

BTW, her has "more passports than Jason Bourne" too upon arrested:
https://www.inkstonenews.com/politics/huawei-chief-financial-executive-meng-wanzhou-seven-passports/article/2177462

Oh I guess the courts must be lying that she also had a HUAWEI MATE 20 RS PORSCHE EDITION.

Hmm she was carrying an old iPhone 7 and a $2000 HUAWEI phone.

Link | Posted on Jun 27, 2019 at 20:03 UTC
In reply to:

beavertown: Samsung refused to develop FF imaging sensors to break Sony's monopoly is inexplicable.

Samsung tried with the NX1, but they gave up too soon.

Link | Posted on Jun 25, 2019 at 01:05 UTC
On article The Sony a9 is a 24MP sports-shooting powerhouse (1821 comments in total)
In reply to:

kevin_r: USB 2.0??? Really? Maybe they expect most people to use the LAN connection.

Anyways, even based on your information, SDcard with 300MB/s is actually 2.4Gb/s (1B is 8b), which is 2.4x faster than the included 1Gb LAN port (actually faster since LAN ports have much larger overhead).

Also you're basing your conclusion because the SD card can't handle the write speeds then a faster port is pointless? Then why include HDMI port (~10Gb/s) for 4k recording? Because you can use a tether device to encode what the camera cannot support (true for most 4k capable cameras). Similar things can be done with photos and live view with faster USB 3.1 bandwidth. Also be extremely nice to handle all I/O through 1 USB-C port.

BTW, I did tether eclipse shot with a Nikon D500 connected to a Macbook via USB 3.0. The USB 3.0 speeds made a huge difference in the workflow. Much faster live view and instantaneous availability for editing and reviewing on the computer (critical when you only have 2 minutes for shooting).

An A9 burst will easily saturate a 1G LAN.

Link | Posted on Sep 3, 2017 at 14:42 UTC
Total: 32, showing: 1 – 20
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