drwho9437

Lives in United States United States
Works as a Student
Joined on Oct 23, 2002
About me:

I study semiconductor devices. I travel and backpack and climb pointy things.

Equipment:

400D
Tamron 17-50 2.8 (all purpose, sharpish, fast enough for most occasions)
Canon 100mm Macro 2.8 (Macro, portrait, tele)
Canon 35 2.0 (lite, sharp, fast, some CA, ok walkaround)
Sigma 10-20 EX (some heft, good build, nice wide)

Panasonic LX3 (lite, small, 24mm, good battery, movies)

Slik Mini Pro Tripod (311g but very short, we will see...)

Comments

Total: 31, showing: 1 – 20
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On article Retro through-and-through: Fujifilm X-Pro2 Review (2469 comments in total)

I would like to know about the apparent size of the electronic viewfinder mode in the XPro-2 vs the X-T1.

Link | Posted on Feb 20, 2016 at 18:02 UTC as 176th comment | 1 reply
On article Going Pro: We interview Fujifilm execs in Tokyo (367 comments in total)
In reply to:

drwho9437: What sub-frame sensors of the past really lacked was the ability to do shallow DOF well. Fuji has largely tackled this issue in there system with low f number lenses. As a result of the maturity of the lens line up it hardly matters what the size of the sensor is.

Serious photographers know it is all about glass at the end of the day not really about the body. Sensors are nice but without the right optics you have a lab instrument for taking resolution charts not photographic tool.

Only foolish people want to carry bigger objects that are heavier so if the optics are done well and fast enough there is really no need for a larger sensor.

Fuji's system still have weaknesses but so do all systems. Extreme noise performance resulting in very high dynamic range is much more important than pixel counts.

It will be very interesting to benchmark the Fuji vs Sony/Nikon who remain the main folks to catch here. But in the end even if you can't push it 4 stops... Its the lenses...

It depends on how much you value smaller. As far as my comparisons go Fuji vs Sony say in many cases Fuji is smaller for the same overall effect. For instance in wide angle territory where DOF is less important Fuji often is significantly ahead.

I agree with you though that the price difference means it is largely a question of optimal glass rather than sensor size at all now.

The idea that a 35 mm Frame is the magic optimal for all parameter isn't rational. It might be or it might be somewhere else. We don't get to sample the parameter space much because of the constrains of lens systems. For my money 4/3 is certainly too small in terms of resolution one can obtain.

Link | Posted on Jan 23, 2016 at 19:06 UTC
On article Going Pro: We interview Fujifilm execs in Tokyo (367 comments in total)

What sub-frame sensors of the past really lacked was the ability to do shallow DOF well. Fuji has largely tackled this issue in there system with low f number lenses. As a result of the maturity of the lens line up it hardly matters what the size of the sensor is.

Serious photographers know it is all about glass at the end of the day not really about the body. Sensors are nice but without the right optics you have a lab instrument for taking resolution charts not photographic tool.

Only foolish people want to carry bigger objects that are heavier so if the optics are done well and fast enough there is really no need for a larger sensor.

Fuji's system still have weaknesses but so do all systems. Extreme noise performance resulting in very high dynamic range is much more important than pixel counts.

It will be very interesting to benchmark the Fuji vs Sony/Nikon who remain the main folks to catch here. But in the end even if you can't push it 4 stops... Its the lenses...

Link | Posted on Jan 22, 2016 at 07:39 UTC as 20th comment | 2 replies
On article Primer: Why would I buy a mirrorless camera? (563 comments in total)

I like mirrorless cameras. I have had FF and APS-C SLRs and film SLRs. I only have an X series Fuji at present, but one thing does bother me about them and that is use in very bright lighting like in snow. My eyes are so dilated closed that framing is impossible. I wear regular glasses and find swapping glasses for sunglasses odd and a hindrance in most cases.

Link | Posted on Dec 9, 2015 at 07:21 UTC as 37th comment | 1 reply

0.0002 mm is not 1/2 of a pixel. That's 200 nm. Pixels are on the order of 2-3 um. There is 1 extra 0 in the stated value.

Link | Posted on Feb 14, 2015 at 17:07 UTC as 50th comment

There were rumors of an update to the 35mm and maybe the Macro as well? I hope these are true, but I doubt it.

I think this is probably now as solid a lineup at m4/3 which is impressive given the single company vs 2 that m4/3 has. I wish the 10-24 mm was smaller but it seems a good lens so far.

I will continue to save my pennies for an X-T1. The only real downside of that camera for me probably will be in cases of snow and sand where my eyes are super dilated which makes non-optical finders hard to see.

Link | Posted on Jul 24, 2014 at 05:59 UTC as 31st comment
On article Fujifilm announces XF 10-24mm F4 R OIS wideangle zoom (172 comments in total)

This lens is heavier than the X-E1 so I hope the center of mass of the lens is toward the rear element otherwise things just become awkward. I have been waiting for this to be released and got a 14mm to tide me over to the release. This is the make or break lens for any system and myself. If it is terrible I will probably dump my X-E1 and lenses and put my eggs into my FF system (happy to dump the FF system if this lens rocks). I probably would need to get something like an X100s if this lens is horrible. Though I could stick with just the 14mm + other primes. I have my fingers crossed.

Link | Posted on Dec 21, 2013 at 03:14 UTC as 1st comment
On article Panasonic GX7 First Impressions Review (1200 comments in total)

Needs a shadow area badly like the last scene had with the box at the lower left. Without that it is very hard to tell color shadow noise level.

Link | Posted on Aug 15, 2013 at 14:09 UTC as 120th comment | 1 reply

Since Adobe stuff was the main thing holding me on windows, I guess this means I will just eventually switch to linux completely and use things like darktable.

Could have interesting knock on effects in cameras that are supported. Thankfully there are plenty of good choices in RAW processing outside ACR. I'll have to give capture one and DxO harder looks but if I have to lose an integrated workflow I will give competitors a big chance. Sad thing is if people worked together for a year we could have something better than photoshop with GPL free forever.

Link | Posted on May 7, 2013 at 18:58 UTC as 173rd comment
In reply to:

drwho9437: My camera is a mirrorless full frame camera similar to a EM5.

It however has a fully electronic pixel mask-able shutter. This allows all sorts of DOF reconstructions and high dynamic range methods to be employed.

To take a simple example, if you place it in HDR mode at 1/250 it will take 3 photos one at 1/1000, one at 1/250 and one at 1/60 in just over 1/60 of a second. This extends the DR of the image by 4 stops without blurring artifacts. Because the shutter is electronic there is no delay to cause blur between the images that would cause alignment issues. The data is integrated into a 3 channel RAW file.

Or equally the camera could sample at the shutter speed many times to integrate to saturation. This would eliminate well depth as a DR limitation on the sensors and provide true tone mappable images even into the darkest shows and brightest skies.

To be clear I am still describing a stills camera however it is possible that the focus (no pun) on video will integrate these features. Video even very HD is low resolution compared to stills, and I care much more about stills. Synthetic aperture cameras have been used in academic research. Completely electronic shuttering has existed in CCDs for a long time.

I believe we have significant room for improvement in spectroscopic data as well. Mimicking the human eye is one thing but the human eye is quite limited. I want a superhuman camera, which can render a subset of the collected data in a human looking way rather than bad looking HDR and other effects.

The ideal camera would let a photographer focus purely on composition and the critical moment, leaving complete flexibility in the technical aspects and processing.

I doubt we will see such a camera. Look at how many people care about JPEGs, dpreview included. JPEGs like MP3s shouldn't exist anymore. "Good enough" for the lazy.

Link | Posted on Oct 20, 2012 at 02:25 UTC

My camera is a mirrorless full frame camera similar to a EM5.

It however has a fully electronic pixel mask-able shutter. This allows all sorts of DOF reconstructions and high dynamic range methods to be employed.

To take a simple example, if you place it in HDR mode at 1/250 it will take 3 photos one at 1/1000, one at 1/250 and one at 1/60 in just over 1/60 of a second. This extends the DR of the image by 4 stops without blurring artifacts. Because the shutter is electronic there is no delay to cause blur between the images that would cause alignment issues. The data is integrated into a 3 channel RAW file.

Or equally the camera could sample at the shutter speed many times to integrate to saturation. This would eliminate well depth as a DR limitation on the sensors and provide true tone mappable images even into the darkest shows and brightest skies.

Link | Posted on Oct 19, 2012 at 23:59 UTC as 454th comment | 2 replies
In reply to:

mr moonlight: I know this is just the Beta version of the software, but wow! Image quality on the Xpro1 looks like it blows the other cameras out of the water at all ISO's

JPEG is okay but the RAW look quite bad, guess they haven't got the demosaicing down yet?

Link | Posted on May 8, 2012 at 00:11 UTC
On article Blackmagic Designs announces Blackmagic Cinema Camera (354 comments in total)

I hope this completely kills the DSLR video market, then maybe we can see feature sets that focus on improving stills rather than video.

Link | Posted on Apr 17, 2012 at 00:39 UTC as 52nd comment | 3 replies
On article Canon acknowledges 'light leak' in the EOS 5D Mark III (257 comments in total)

Pretty much a non-issue issue. Mostly because if you are shooting at something dark there isn't enough light to go into LCD to change the metering. You have to have something bright while shooting in the blackest possible conditions. In normal conditions this effect won't change the metering even 1/3 of a stop...

So it is a bit silly. The only time this would maybe be an issue is if you do use the backlight in the dark on a tripod to check the exposure I guess. In that case you might want to look through the finder to change the exposure or use the LCD quick menu...

Link | Posted on Apr 16, 2012 at 20:09 UTC as 82nd comment | 2 replies
In reply to:

jskrill: Can you please define PL, EF, F, MFT and E mounts.

I didn't know what PL was; presumably http://en.wikipedia.org/wiki/Arri_PL

EF -> Canon
F -> Nikon
MFT -> micro four thirds (Panasonic/Olympus).
E -> Sony

Link | Posted on Apr 6, 2012 at 14:59 UTC
On article Samsung US announces rugged and waterproof SD cards (49 comments in total)

There is nothing inside an SD card that can be damaged by water as long as you don't power it on with it still wet and lots of ions in the water...

If you drop your card in the ocean you can simply take it home and put it in deionized water, and change that repeatedly until all the salt is gone. Then let it dry out. One way to help that is to use IPA to displace the water. Do that a bunch of times. Then let it sit.

Alcohols and high resistivity water is ubiquitously used in semiconductor processing.

Link | Posted on Feb 19, 2012 at 16:00 UTC as 10th comment | 2 replies

The reply seems based on the proposition it is ethical to expect a business that lasts only 1/3 of the year to yield a yearly income. It isn't. If you wanted to make say 50K for photography on a full time yearly basis that would be fair. So the prices are about 100% to high by his own numbers it would seem.

Link | Posted on Jan 27, 2012 at 23:59 UTC as 103rd comment
On article Olympus raided over accounting scandal (83 comments in total)
In reply to:

Tim F 101: Sad to say, this is one reason why I bought a GH2 over the EP3. I love my E-P1 but I have no idea what kind of warranty or repair support I can expect a year from now. I hope like heck that Oly makes it through this (and with different management), because their optical division truly does make excellent and innovative products.

That is pretty silly... But if enough people are silly it could hurt them. Having shot for 20 years and never had a camera repaired by the factory... Just buy a used one in a year if yours fails... Normally the deprecate rapidly.

Link | Posted on Dec 21, 2011 at 21:46 UTC
On article Olympus raided over accounting scandal (83 comments in total)
In reply to:

James Wages: As well all very well know, Olympus does have some very competitive cameras in the mirrorless market. Panasonic would be well served to buy up this company on the cheap so they can learn how to make decent in-camera JPEGs. (As a GF-1 owner, I know how JPEGs suck raw eggs. In-camera JPEG may not be important for pro users, but my wife hates to shoot RAW, so having stunning Olympus-style in-camera JPEGs would have the net effect of making some of the photos that exit my Panasonic cameras look better.) If Panasonic doesn't do something, in light of the amazing NEX-7, SONY will capture the mirrorless market before we know it. I have bought heavily into the GF-1 / µ4/3 world, but having been a Minolta SLR film camera user a decade ago, the NEX-7 compels me to put those old lenses to good use. If this news spells death for Olympus, it will be interesting to see how things in the compact mirrorless market pan out over the next year.

The bulk of their business is not cameras. Buying a few firmware engineers out of the company is a lot cheaper than buying the whole company...

Link | Posted on Dec 21, 2011 at 21:45 UTC
On article 10 Photography Accessories for Under $250 (62 comments in total)
In reply to:

(unknown member): You'd not get many of the more expensive items at those prices here in NZ!

That 32Gb card costs almost $600 if you need a CF card rather than SD. The 128Gb CF card costs a whopping $2,000 here!!

Buy one off eBay? Someone will mail it to you first class from the US for a huge sum of 2 dollars I bet... It would be there in under a week.

Link | Posted on Nov 21, 2011 at 07:06 UTC
Total: 31, showing: 1 – 20
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