January 29, 2015, 10:06:52 PM

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Messages - c.d.embrey

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16
Lenses / Re: TS-E Depth of Field newbie question
« on: January 14, 2015, 02:13:43 AM »
...... both the gear teeth (at the back) and the threaded holes (at the front) are in acceptable focus, even though they are at 90° to each other.
I think you meant to present a concept differently than you have and I'm clueless about your actual intent.
All the threaded holes visible in the Offenhauser pump pictured are actually very parallel (0°) to the gear teeth.
Can you please re-phrase for clarification?

The removale front of the pump is one leg of an "L." The body of the pump is the other leg of an "L." Where the two legs of the "L" meet is a 90° angle, forming two different planes. Both the side of the body (one plane of the "L"), and the removable front piece (the other plane of the "L") are on two different planes. Both planes are in Acceptable Focus, but how can this be ??? Some posters have said that only one plane can be in focus, therefore I must have made a very large mistake because my photo clearly shows two planes in Acceptable Focus ;)

17
Lenses / Re: TS-E Depth of Field newbie question
« on: January 14, 2015, 01:45:43 AM »

No, it isn't a cone, the plane of focus is a plane not a point, so the area of acceptable focus is a wedge shape, like a piece of cheese or cake, on its side for tilt and, in a 'normal' orientation for swing.

Cone ... wedge, whatever. You do see the that the focus widens as you travel farther along the hinge line, which is the point.

18
Lenses / Re: TS-E Depth of Field newbie question
« on: January 13, 2015, 02:14:04 PM »
Focus for a Tilt & Shift lens is a Cone. See first page http://www.trenholm.org/hmmerk/VCFaDOF2.pdf
The farther you go along the hinge line the larger the diameter, so it is possible to have the basket in focus.

Shooting this outdoors on a Schoolyard Black Top Basket Ball Court would not be a problem to hand-hold (lots of light).

Focus and Acceptable Focus There's a thing called Depth of Field. You don't have to be at the point of Perfect Focus to be in Acceptable Focus. Notice that both the gear teeth (at the back) and the threaded holes (at the front) are in acceptable focus, even though they are at 90° to each other.

19
PowerShot / Re: Convert the PowerShot N into a Rolleiflex Style Camera
« on: January 13, 2015, 04:29:32 AM »
Rolleiflex? The Rolleiflex is a two-eye reflex. You mean Hasselblad, which is a single lens reflex.

Kind regards,
Rob.

I guess you've never seen a Rollei SL66  http://www.sl66.com  or a Rollei Hy6  http://www.digital-photography.org/reviews_price_comparisons_medium-format_645_digital_camera_backs_for_Hasselblad_Mamiya_Contax_Rollei/Sinar_Hy6_medium_format_digital_camera_reviews_compare_prices.php

20
Lenses / Re: TS-E Depth of Field newbie question
« on: January 13, 2015, 04:18:21 AM »
The best thing to do is test, test, test. It is possible to hand-hold a T&S lens, it's done more often than you'd think.

What you need to do is learn something about how a T&S lens focuses http://www.trenholm.org/hmmerk/VCFaDOF1.pdf  and  http://www.trenholm.org/hmmerk/VCFaDOF2.pdf

To test, rent a T&S lens of the proper focal length. Set up a tripod at the location you will shoot from and play-around with ISO, f/stop, shutter speed and focus. If you can get acceptable focus, and a fast enough shutter speed then remove the camera from the tripod and see what you can do hand-held. I often use T&S lenses, and this is exactly what I'd do.

21
EOS Bodies / Re: A New xxD DSLR Coming From Canon [CR1]
« on: January 12, 2015, 06:12:49 PM »
I won't be buying any New Canon cameras until they launch an xxD quality mirrorless. NO GAS here, all my Canon Film SLRs and DSLRs still work fine.

22
EOS Bodies - For Stills / Re: Wait for 5D4 or go for 5D3/6D right now ?
« on: January 11, 2015, 12:50:29 PM »
Hey guys,

My old DSLR body is canon 400D....it's very very out of fashion.

I'm going to take a 2-week trip to Germany in June and I should bring a good and reliable camera with me at then.

Should I wait for 5D4 ?   

Any idea ?

Thank you.

Why not get a Canon 70D ??? It's a BIG step-up from your 400D (XTi in the USA). Or you could wait for the 5D5 ???

23
EOS Bodies - For Stills / Re: Difference in image from APS-C to FF
« on: January 07, 2015, 03:22:51 PM »

For working outside the studio, I prefer looking like an average tourist. Pro bodied cameras with big zoom lenses attract attention from everyone, including the police. For me a crop mirrorless, with a prime lens, would be perfect (Canon are you listening?).

Quote
You mean EOS M with a 22mm 2.0? (35/f3.2)

NO, I was thinking of a Pro camera, Something like a Fuji X-Ti (EVF, decent grip size, etc), with a nonexistent 10mm f/1.8 or maybe a nonexistent 17.5 f/1.8.

BTW f/2.0 is ALWAYS f/2.0, if I were to use f/3.2 the exposure would be wrong ???

24
EOS Bodies - For Stills / Re: Difference in image from APS-C to FF
« on: January 07, 2015, 03:02:57 PM »
It all depends upon what you are doing. I shoot for magazine output, not large prints. For magazine use the is NO difference between M4/3, Canon APS-C and Full Frame. BTW I shoot FF with a 90mm f/2.8 TS-E in the studio, and xxD with either an EF-S 10-22mm or a EF 85mm F/1.8 for outside or personal work.

Magazines are printed at about 150 DPI. Advertising is submitted as 300 DPI PDF files. Standard magazine size is 8 3⁄8” x 10 7⁄8” scanned at 300 = 2513 x 3263 DPI. A 16 Megapixel M4/3 Olympus E-M1 is 4608 x 3456 pixels. A Canon 70D (5472 x 3648 pixels) would be overkill for what I do, YMMV.

For working outside the studio, I prefer looking like an average tourist. Pro bodied cameras with big zoom lenses attract attention from everyone, including the police. For me a crop mirrorless, with a prime lens, would be perfect (Canon are you listening?).

25
Lenses / Re: The f/4 Pentacon
« on: January 06, 2015, 04:27:45 PM »
Pentacon was the name of an East German camera/lens manufacturer :) http://en.wikipedia.org/wiki/Pentacon

My first thought was why would a Canon owner want to adapt Pentacon lenses to his Canon camera ???

Never-mind ;)

26
Lenses / Re: samyang 12mm / 16mm experiences. Ef-m generally.
« on: January 03, 2015, 12:35:32 PM »

On a more general subject (the I'm  may chip in here with something they read or even came up with themselves - it's a more conceptual question, so ill informed hypothesis is as welcome as any other...) do you think it is a waste of time buying ef-m lenses for the long ball game?

I'm a slack-jawed belly rumbler who is also an IATSE retiree. I've worked on everything from Educational/Documentery to MOWs (TV Movies) to Feature Films.

Quote
I am very happy to shoot on aps-c and have no issue buying dc dx ef-s etc lenses from canon or anybody else, as I'm not going full frame.

No need for Full Frame -- Hollywood doesn't use Full Frame, so why should you ???

Quote
If I get the ef-m mount 12 then I can only ever use it on an m.  Fine just now.  But what about in 2 years when I'm being asked for 4k video?

Will you be asked to shoot 4K in two years (or ever) ???
From News Shooter (dot) com "A big proportion of shooters now own 4K capable cameras but just how many of you are being requested to shoot in 4K for paid jobs? Most of my clients in the documentary and corporate world still ask for HD MPEG files. I would love to shoot in 4k but the reality is no one wants to deal with it. For broadcasters 4K is a long way off." Here's the link  http://www.newsshooter.com/2015/01/03/will-2015-finally-be-the-year-for-4k/  If you are interested in video, News Shooter is the best I've found on the net.

BTW this lens is inexpensive. You could throw-it-away in two years, and still have a good ROI (return on investment).

Quote
So I guess the proposition is, getting a more vanilla 16mm that works with everything today and most probably tomorrow (including the duffer x0d bodies I buy cheap for knackering with timelapse) or get the more exciting 12mm which might never be any use for any other camera than one of the m's (or a third I may dedicate to ml timelapse) m's are so cheap just now, but will that be the case in 3 years? will they even be around in 3 years?

Just guessing, but I think the EF-M mount will be around for a long time.

27
EOS-M / Re: EOS-M Optical Viewfinder
« on: January 02, 2015, 04:05:58 PM »
Here's another idea  https://sqminiintheboxgadgets.wordpress.com/2014/10/09/ableto-lsh-a35-led-screen-sun-shade-and-protector-for-canon-_p1779451/  A sun shade for the rear screen. This seems awfully expensive at $48.00, I've found one for may NEX 5n for less than $10.00. You just have to spend some time on Google.

A sun-shade would be better than nothing hand-help, and perfect on a tripod.

28
More than a few PJs use their phones for news. Check-this-out! A story from Ireland's RTE tv news, filmed entirely on an iPhone 6 Plus. http://vimeo.com/114265059

I'm planning to shoot some tests to see if I can use an iPhone for paid advertising work. For video, meant for the web, iPhone/iPod video is more than good enough. Ads are submitted to a magazine as 300 DPI PDF files, I'll test to see if iPhone quality is good enough for 1/2 page or even 1 page ads.

BTW sometimes I use my Canon EOS Elan 7n film camera, but most of my fun shooting is done with an iDevice. The DSLRs only come out for paid work.

29

Maybe a few things could help expand the current market.  Simplifying the choices is one (and getting rid of the APS-C and associated specific lenses is part of that).

Most people buy APS-C cameras. Simple as that ;)

Quote
Following the Apple model of getting into schools with sponsoring of photography classes is another.

Why would kids that have been using Camera Phones all their life, sign-up for photography classes ??? This is akin to offering licensed automobile driver a course teaching them how to drive a horse-and-buggy rig ;)

Don't worry, the up-coming generations will find other expensive hobbies to waste money :)
 


[/quote]

30
The decline in sales has to do with the fact that No-one - Cares. Hobbies come and hobbies go - where are all the Audiophiles and their expensive sound systems ??? They were replaced by relatively inexpensive iPods that were more than good enough for most music listeners. The same is happening with photography. While Very Serious Photography Enthusiasts will cling to their DSLRs the masses will use more than good enough Camera Phones.

At one time there were a lot of Home Built Computer Enthusiasts, now most people just buy commodity computers from Best Buy/Whatever or have replaced their computer with a Smart Phone or Tablet for e-mail or blog reading/social networking. People watch Netflix on their Smart Phones. Time Marches On.

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