October 20, 2014, 09:40:51 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Jim Saunders

Pages: 1 ... 3 4 [5] 6 7 ... 60
61
EOS Bodies / Re: LP-E6N in 5DMK III
« on: September 18, 2014, 12:18:19 AM »
If the N batteries are built to more recent Japanese safety standards, they might end up being easier to carry on flights; they're small compared to laptop batteries but non-trivial.  Other than that I don't see any reason other than availability to make the change.

Jim

62
EOS Bodies / Re: LP-E6N in 5DMK III
« on: September 17, 2014, 11:39:19 PM »
We need someone who has used the new battery for 1D X (LP-E4N) in a 1DsIII, 1DIII or 1DIV and can tell if it had a longer life compared to the LP-E4.

That wouldn't be a directly useful comparison: the LP-E4N is advertised as having an additional 150 mA·h capacity over the LP-E4, while the capacity for the LP-E6 and E6N is advertised at 1800 mA·h.

Jim

63
Lenses / Re: Lenses that you want Canon to release next
« on: September 17, 2014, 10:55:05 PM »
Lenses that I think Canon has the capability to produce in the near future:

Now for the lenses I *personally* fantasize about seeing Canon make, but doubt they can or will:

8.  EF 300/1.8L USM.  Canon has designed and patented it, at least on paper.  It would be a beast, but without a doubt, there would be nothing remotely comparable in the 135mm format world.

Your first four seem probable.  #8 not so much, but I guarantee you I'd rent the hell out of one if it ever happened!

Jim

64
EOS Bodies / Re: AE-1 Styled DSLR from Canon?
« on: September 17, 2014, 10:12:38 PM »
Do I need something like that?  No.  Would I play with it at a camera store?  Probably.  Maybe run off enough to keep one at each camera store just for the sake of a conversation piece.

Jim

65
Another angle:  If I was going to buy your lens, I'd give you its value given its cosmetic condition less repairs and shipping; as long as you have the box etc then I regard it as worth fixing.

Jim

66
EOS Bodies / Re: How can we improve on 5D3 to 5D4?
« on: September 17, 2014, 08:01:53 PM »
actually i wasn't kidding at all. i get the sense i know a great deal more about Ti and carbon fiber than you guys do. not only that you guys must not very active people, tons of stuff is made from these products these days. you certainly can buy a Ti carbon weave racket just about anywhere. expensive? well, not in the amount we're talking about for a camera body. In the fields of racing/aero/space these items have been around for decades.... my watch is solid Ti, my motorcycle is made up many large pieces of Ti, carbon, aluminum, mag, a ceramic aluminum sintered matrix, and some good old steel as well. i know what i'm talking about. berylium? please, how about econel? you don't know nuthin' about metals or tennis.

Perhaps you mean Inconel?  Show me a titanium camera housing, or a carbon fiber one, and we'll talk.

Jim

67
Lenses / Re: how to get 300 2.8
« on: September 17, 2014, 12:05:07 AM »
Two fliers on the plot:

200 f/2.8 & crop; it could work if you're not producing big prints.

300 f/4: Sharp, cheap, light weight, if you can afford a stop.

I put these to you as questions to consider to make sure you need to spend for a 300 f/2.8; you're the one who knows for sure.

Jim

68
EOS Bodies / Re: How can we improve on 5D3 to 5D4?
« on: September 16, 2014, 11:58:35 PM »
-carbon fiber or Ti body. hell my inexpensive tennis racket from Walmart is made from a Ti carbon weave. it cost like $30-40 weights nothing, is super tough.  really, get it done canon.

This is a joke, I presume.

I assume as much; titanium and carbon fibre in any meaningful application does not change hands that cheaply.

Jim

Dunno, how much metal is in a tennis racket compared to a camera body?  I found a titanium racket at Amazon for $35.

I could be convinced otherwise but I expect marketing had more to do with titanium mentioned in the context of the racket than engineering.  It could be titanium whiskers in the matrix of carbon fibers to essentially pin the layers together, in which case it would be a fairly small proportion by weight.  (Then again it could be white titanium dioxide paint.)

Titanium sheet alone is miserably expensive never mind anything cast and machined from it.

The relevant question is whether either material would make a meaningfully better body; magnesium is affordable and easier to cast and machine than titanium.  It also conducts heat and electricity well enough to be useful; titanium conducts both poorly. Carbon fiber isn't really suited to the job of filling fine details and supporting many threaded bosses.

I'd like everything to weigh less, but I'm pretty sure Canon's engineers have a solid grasp what works and is still reasonably affordable.  I would dearly like to sit in on their brainstorming though...

Jim

ETA - If I was going to machine a tennis racket out of anything I'd try beryllium; it'd be heavier and your machinist might get lung cancer but it'd be stiff.

69
Lenses / Re: Lenses that you want Canon to release next
« on: September 16, 2014, 11:24:50 PM »
135L II

With IS the budget be damned; that and a 200 f/2 for indoor sports.

Jim

70
EOS Bodies / Re: How can we improve on 5D3 to 5D4?
« on: September 16, 2014, 11:23:44 PM »
-carbon fiber or Ti body. hell my inexpensive tennis racket from Walmart is made from a Ti carbon weave. it cost like $30-40 weights nothing, is super tough.  really, get it done canon.

This is a joke, I presume.

I assume as much; titanium and carbon fibre in any meaningful application does not change hands that cheaply.

Jim

71
EOS Bodies / Re: How can we improve on 5D3 to 5D4?
« on: September 15, 2014, 11:57:50 PM »
ISO compensation in M.
Integral dovetail on the bottom or dual mounting screws.
Stiffer spring or second action for the lens release button.

Jim

72
Animal Kingdom / Re: Show your Bird Portraits
« on: September 15, 2014, 10:01:47 PM »
I don't know what it is.  I didn't shop it either, I wish I had because then it would make more sense.   ???  It is however the triumph of five-figure ISO and LR5 over good lens selection.

Jim

73
Lenses / Re: Should I try to fix my Canon EF 28-70mm f/3.5-4.5 II?
« on: September 15, 2014, 09:09:05 PM »
Roger Cicala, the white courtesy phone...

Jim

Well, thanks for the advice Jim, such a helpful bunch.

If he reads this, he'll probably have a useful answer for you.  If he doesn't answer here, perhaps an e-mail in his direction is worth it.  I don't know about fixing this lens, but I'd appreciate it if you'd keep in mind my taking the time out of my life to point you in the direction of an answer to your question.

Jim

Jim,

Your response went over my head, I apologize, I have no idea who Roger is, let alone the white courtesy phone.
Now that you explained your response, I get it...10-4

In that case I should apologize for being testy; for context Roger's blog is at lensrentals.com/blog and there's an awfully good chance he has seen the inside of one of these.

The white courtesy phone is directly a nod to this but to white courtesy phones everywhere.  I mean if you can still find one...

Jim

74
Lenses / Re: Which Tilt/Shift lens to choose?
« on: September 15, 2014, 08:37:39 PM »
Anyone try the Schneider 2.8/50?  It it expensive, heavy, and who knows about filters but I think it is the right length for a job I have in mind.  I expect it is a lens where I can do well enough on resale to make it cheaper to own briefly rather than rent.

Jim

75
Lenses / Re: Should I try to fix my Canon EF 28-70mm f/3.5-4.5 II?
« on: September 15, 2014, 08:35:09 PM »
Roger Cicala, the white courtesy phone...

Jim

Well, thanks for the advice Jim, such a helpful bunch.

If he reads this, he'll probably have a useful answer for you.  If he doesn't answer here, perhaps an e-mail in his direction is worth it.  I don't know about fixing this lens, but I'd appreciate it if you'd keep in mind my taking the time out of my life to point you in the direction of an answer to your question.

Jim

Pages: 1 ... 3 4 [5] 6 7 ... 60