Mark 100

Lives in United States United States
Joined on Dec 10, 2010

Comments

Total: 10, showing: 1 – 10
On article Opinion: Enthusiast compacts have finally come of age (496 comments in total)
In reply to:

Biowizard: Seeing the numerous responses to my earlier post about sensor sizes ("Can someone remind me - just HOW big is a '1 inch' sensor?"), several people suggested something relating to the 135 format (35mm, "Full Frame", actually 35mmx24mm, or about 43.25mm diagonal).

This makes sense to me too, but most folks suggested something relating to the _area_ of the sensor: however, this is now how anyone currently thinks. All those "35mm equivalent" and "crop factor" quotes beloved of this website, are _linear_, not squared.

Of course, we also need to know the aspect ratio, as there is a heck of a difference between formats, from square in the medium format world, to 16:9 in default modes in some consumer cameras.

So my suggestion is this: treat 135 as the "standard" full frame, and using its diagonal as the standard reference point, notate it as:

1.00/3:2 (1.0 diagonal, 3:2 aspect ratio)

4/3rds, with a diagonal of about 21.65mm, would be:

0.50/4:3 (0.5 diagonal, 4:3 aspect)

Brian

I'd like to add another example of a sensor size,
E.g. RX100 1" (13,2*8,8) = 116, where the diameter is 15,86mm, and an inch is 25,4mm. I'm aware of the origin of the 1" term, but it's applied inconsistently (and underhandedly).

Link | Posted on Mar 3, 2016 at 12:15 UTC
On article Opinion: Enthusiast compacts have finally come of age (496 comments in total)
In reply to:

pieranti: I traveled with a Canon Powershot G15 that did not disappoint despite the sensor size. http://www.dpreview.com/galleries/5195451339/photos/3188787/img_2003

I travel with the Canon S95 (same sensor size as G15). Very handy, pocketable camera. DPReview Side-by-Side can be more accurate and complete e.g. in low light the S95 ISO extends to 12800.

Link | Posted on Mar 3, 2016 at 11:18 UTC
On article Opinion: Enthusiast compacts have finally come of age (496 comments in total)
In reply to:

Biowizard: Seeing the numerous responses to my earlier post about sensor sizes ("Can someone remind me - just HOW big is a '1 inch' sensor?"), several people suggested something relating to the 135 format (35mm, "Full Frame", actually 35mmx24mm, or about 43.25mm diagonal).

This makes sense to me too, but most folks suggested something relating to the _area_ of the sensor: however, this is now how anyone currently thinks. All those "35mm equivalent" and "crop factor" quotes beloved of this website, are _linear_, not squared.

Of course, we also need to know the aspect ratio, as there is a heck of a difference between formats, from square in the medium format world, to 16:9 in default modes in some consumer cameras.

So my suggestion is this: treat 135 as the "standard" full frame, and using its diagonal as the standard reference point, notate it as:

1.00/3:2 (1.0 diagonal, 3:2 aspect ratio)

4/3rds, with a diagonal of about 21.65mm, would be:

0.50/4:3 (0.5 diagonal, 4:3 aspect)

Brian

I like what Brian says.
Does abstruse terminology assist the practitioner or the potential buyer; I suspect the latter. Sensor area, 135 format, diagonal, image circle diameter, all terms but with each camera test and after reviewing the specs I'm recalculating the given info to a consistent standard.
To add to Brian, perhaps the surface area (in mm) might be a simple guide, as a standalone or as additional info to diagonal & aspect ratio.
E.g. 135 sensor size (36*24mm) = 864
E.g. Canon S95 (7,6 * 5,7) = 43
E.g. Nikon D5500 (23,5*15,6) = 366
E.g. Medium format (56mm x 67mm)=3752

- Mark

Link | Posted on Mar 3, 2016 at 11:07 UTC
On article Real-world test: Nikon D750 at the Museum of Flight (281 comments in total)

Not sure what to think of this video. It's a hardsell for Nikon.

I would prefer a sober evaluation, e.g. by Thom Hogan (bythom.com) and critical comparative image evaluation (e.g. photozone.de).

The video disappoints: 1920 x 1080. Perhaps next year Nikon will match the Panasonic GH4 (4096 x 2160 (24p), 3840 x 2160 (24p, 25p, 30p)).

Link | Posted on Dec 3, 2014 at 09:43 UTC as 62nd comment | 3 replies

DP Review would do well to find new grades of photographic competence, the integrity of which cannot be imitated. Yes, so I went overseas, took some pics, gave my opinion to someone at a bus stop on a certain camera; now I'm ALSO an international traveler, street photographer and lecturer, and this is backed up by my links on Twitter/ Facebook.

The title of this 'essay' is misleading, and the pics are horrendous. Any integrity of this piece goes to the book he's reviewing, not himself. The subject of choice, purchase, cost and benefit is important, but must it come in this packaging?

I suspect this article will find its way into the same basket as 'Professional advice on Street Photography' because it's been on DPReview, and this is grossly insulting to the damn fine contributions made by other photographers in the field.

Link | Posted on Sep 4, 2013 at 09:02 UTC as 10th comment
In reply to:

stratplaya: Tomato, tomahto.

Tomato, Jomato

Link | Posted on May 25, 2013 at 12:17 UTC

Graphics Interchange Format is abbreviated to GIF, which is also an acronym.
The purpose of abbreviations and acronyms is, inter alia, to promote efficiency in referring to concepts, but the general rule is that the sound of the letters in said abbreviation goes back to the words compiling the concept.

As much as the world is grateful for the GIF file, it is not Wilhite's (pronounced Jones) place to redefine pronunciation. His Jif-pronunciation messes with the efficiency of the acronym.

Examples
http://en.wikipedia.org/wiki/Acronym

Link | Posted on May 25, 2013 at 12:14 UTC as 16th comment | 1 reply
On article Canon launches PowerShot SX40 HS 35x CMOS superzoom (160 comments in total)

What is the actuation lifespan of this camera?

If anyone knows, please post this somewhere under a simple findable heading, e.g. "Actuation Benchmark SX40".
I'm referring to the sensor corrupting, and they do corrupt and the repair cost might outweigh the second-hand market value.

I'm still smarting from my Canon SX-10, for which I bought the lensmate attachment, the filter adaptor, extra lenses to fit onto the filter adaptor, multiple sets of batteries, dedicated camera bag and other extras, all worthless when the sensor corrupted after the 1 year warranty expired.

Link | Posted on Sep 20, 2011 at 17:20 UTC as 23rd comment | 3 replies
On article Canon launches PowerShot SX40 HS 35x CMOS superzoom (160 comments in total)
In reply to:

Lupti: 1080p24? The old SX1 IS had 1080p30. Geez, shove 24p up your ar*e, Canon. FZ150 offers 50/60p and you come up with 24p? Fail.

Agreed.

SX 1 - what happened to that angle - did Canon find it to good for the competitors and decided to wait for a more developed market?

SX 20 also has 12 MP, and takes penlight batteries.

It seems Canon brings out a good model and then releases micro changes to suit the market demand. E.g. Canon G10 - then G11 and G12, talk about going backwards.
Real competition is needed. Let's hope Sony can offer it.

Link | Posted on Sep 20, 2011 at 17:04 UTC

How many actuations before the sensor is corrupted? Higher sensor sensitivity increases the risk. The first manufacturer that offers a benchmark guarantee, e.g 20 000 actuations within a 36 month perion, wins my loyalty.

Link | Posted on Sep 20, 2011 at 16:39 UTC as 4th comment
Total: 10, showing: 1 – 10