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Messages - rs

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151
Third Party Manufacturers / Re: New Nikon D800s... Why?
« on: June 25, 2014, 10:58:45 AM »
It looks like it's going to be announced imminently, and named the D810:

http://nikonrumors.com/2014/06/24/nikon-d810-announcement-this-week.aspx/

Without meaning to repeat a question from earlier on in this thread - why?

152
Lenses / Re: Why do fast primes not have IS?
« on: June 25, 2014, 03:06:43 AM »
See the 24-70 IS L II or the 70-200 IS L II.
I though we're still on the first version of that f4 lens?  ::)

153
The FD mount has a shorter flange distance than EF - 42mm vs 44mm - so by the time you've added physical mount adapter to the 44mm, you end up with a total lens flange to sensor distance much greater than 42mm. Either you lose infinity focus, or there are optical elements (much like a mild TC) which further degrade the image quality of these old lenses.

In short, nothing works, bar one ingenious solution made by Ed Mika (who is also a member on this forum)

http://www.edmika.com/
http://www.canonrumors.com/tech-articles/fd-fl-lenses-on-your-ef-body/

His solution is custom made for each lens. Not all lenses can be adapted, and the cost makes it pointless on a cheap lens. Good L FD lenses are worth converting.

154
Lenses / Re: Tamron 90 macro or Canon 100 for portraits?
« on: June 20, 2014, 06:43:48 AM »
This is about "the look" of the images mainly. I'd used my 100/f2 on Sony apsc a700 at f/2.2 quite a bit for a wedding and other people specific shooting and really liked that space. And it was even better on full-frame a800.

100/2 on a Sony (1.5x) crop behaves much like a 150/3 lens on your 6D. F2.8 on FF is slightly better, but throw in the wider angle of view and things change again.

I'd say you've made an excellent choice going with the 100L - mine is simply great. Light, compact, solid, great IS, fast AF (with the focus limiter on), very sharp and great bokeh.

155
EOS Bodies / Re: DSLR vs Mirrorless :: Evolution of cameras
« on: June 20, 2014, 03:26:13 AM »
On the one hand I understand that the EOS-M takes advantage of mirrorless technology to produce a camera that is more compact.  However, I feel the drawback is that it needs it's own special line of lenses.

I think Canon should also be producing a mirrorless camera that can use it's regular EF lenses.  Essentially it would be a DPAF APS-C or FF sensor camera with a built-in EVF replacing the usual pentaprism and packaged in a body that is similar to other EOS DSLRs.

It wouldn't be more compact, but it would have a similar feel and handling as it's contemporary consumer and professional cameras for which Canon is so renowned and celebrated.

Are you talking Pentax K01 or one of the many Sony DSLT's?

156
EOS Bodies / Re: New Sensor Tech in EOS 7D Mark II [CR2]
« on: June 19, 2014, 03:24:19 PM »
So, you never know. The 7DII could have the first non-Bayer sensor in a DSLR.

Sigma beat them to it back in 2002 with the SD9 and it's foveon sensor. And the many models which have superseded it. But even they were beaten to market by the Fuji S1 Pro of 2000 with its Super CCD arrangement.

157
EOS Bodies / Re: DSLR vs Mirrorless :: Evolution of cameras
« on: June 19, 2014, 07:40:15 AM »
For your needs now, it depends upon what you want.

Are the current generation EVF's good enough for you, or will only OVF's do?

And then as for the size of the body and the lenses, yes, mirrorless are typically smaller. But once you get over the more extreme retrofocus lens design required on wide angle lenses to accommodate the mirror assembly, there really isn't much in it with like for like lenses.

If you want to have the best low light performance and/or a really shallow depth of field, there's only one way to get it - a lens with a huge entrance pupil. That means the glass will be equally big on either system - and something the size of an 85L on a tiny m43 body doesn't make much sense. There again, if you only have lenses the size the 40/2.8, a smaller body with an equivalent lens (if a 20/1.4 pancake existed) might make a lot more sense.

And as for which system will be around in the future and worth sinking your money into, look at sales of DSLR's vs mirrorless. DSLR's seem to be a lot more buoyant right now. And then also look at how some manufacturers are willing to drop mounts, leaving people with a load of expensive lenses and no new bodies. For example, Panasonic/Olympus with four thirds, Samsung with the K mount (although Pentax still use that), and Sony look set to drop the A mount. Yes, Canon did it back in '87, but they look set to stick with the EF mount long term.

Obviously it's your choice, but after a lot of careful deliberation I did what almost everyone else on this forum has done - invested my money into the Canon system.

158
Someone mentioned that if I go with the 70D that my L series lenses might not be a good choice with that camera. Does the 24-105mm 4.0 and the 70-200mm 2.8 not work well with the 70D? I also have a Canon 50 mm AF 2.5 macro lens I could use as well.

That was me. One of the criteria you added as an advantage of the 70D was its video AF. That particular feature will be a real let down if you stick with your L lenses (or any non STM lens):

As good as the 70D's video AF is, using it with anything but an STM lens will leave you selecting manual focus every time - USM lenses have AF which is far too fast for smooth focus, and the end result is choppy AF which not only looks bad, but gets loud as it stops/starts all the time:

http://petapixel.com/2013/08/26/video-comparing-canons-usm-and-stm-lenses-using-the-70ds-dual-pixel-af/

Plus of course the angle of view will change with the crop, so your primes and zooms will all frame very differently. In other words, if you swap out your 5D mk II for a 70D, you'll also need to swap all your nice L lenses for cheaper, slower STM lenses to utilise it to its full potential.

Get a 6D, and you'll not lose out on any cutting edge features (or framing) you're paying for by sticking with your current lenses.

For stills and for manual focus video, the L lenses and the 70D are great. Just don't expect video AF to be anything you'd use in reality with USM lenses.

159
As good as the 70D's video AF is, using it with anything but an STM lens will leave you selecting manual focus every time - USM lenses have AF which is far too fast for smooth focus, and the end result is choppy AF which not only looks bad, but gets loud as it stops/starts all the time:

http://petapixel.com/2013/08/26/video-comparing-canons-usm-and-stm-lenses-using-the-70ds-dual-pixel-af/

Plus of course the angle of view will change with the crop, so your primes and zooms will all frame very differently. In other words, if you swap out your 5D mk II for a 70D, you'll also need to swap all your nice L lenses for cheaper, slower STM lenses to utilise it to its full potential.

Get a 6D, and you'll not lose out on any cutting edge features (or framing) you're paying for by sticking with your current lenses.

160
Reviews / Re: DxO reviews Sony A7s: king of low light photography?
« on: June 17, 2014, 07:17:06 PM »
12 bits per pixel, 13.2 EV dynamic range? That's even more far fetched than Nikon's 14 bit, 14.3 EV stats

161
...sliding surface that is exposed to the elements[/b...

The 17-40 does not do this...

If you were referring to the moving of the inner tube, I can assure you that 17-40 moves in very similar fashion :) It's the same with 16-35, 16-35 II and now 16-35/4 actually.

+1. All Canon UWA zooms have a moving front element.
OP, when you use filters just use a filter cap (Lee makes them) when you're not actively using them. At other times, there is a filter in the front.
I am curious, who is this person and how did he get a pre-production copy. Also, I am surprised he didn't know Nikon has an UWA zoom with VR.
And Canon previously released the EF-M 11-22 IS STM

162
2. Why do we need more than 12 stops of DR?

So our cameras can finally capture the dynamic range our monitors and prints can output. Oh, hold on  :o

163
EOS Bodies / Re: More EOS 7D Replacement Buzz Going Around [CR2]
« on: June 10, 2014, 07:23:38 AM »
Here is my guess/wishlist

price: $2000 body only
10fps with about a 40-50 raw frame buffer
5d3 AF system
full weather sealing
wifi
dual pixel AF system from 70D
new sensor different from 70D (one stop better noise performance and one stop better DR)
possibly 4k video and 1080p/60p? One can hope.

Anyone agree?

Long:
  • Price - probably not too far off (probably >£1700 in the UK)
    fps - probably on the nail
    raw buffer - unlikely, probably closer to 30-35 as the 1D only has 38
    5DII AF - quite likely, cant's see why not as it is proven technolgy
    weather sealing - probably
    wifi - definitely, as cheap and commonly occurring now
    70D DPAF - probably a similar solution but not same system due to (hopefully) new sensor
    New sensor - absolutley needed, as 7D was revolutionary, so the 7D2 should be
    ISO and DR - probably
    4K - could be, as that wolud be revolutionary for the video people out there

Short:
Yes  :)
Any AF chip designed for a FF camera won't work with a 1.6x mirror assembly - there simply isn't enough coverage for such a chip. Unless they make a 1.6x sensor body use a 1.0x mirror, with all the additional cost, speed implications and lack of compatibility with EF-S lenses that brings. No reason why a scaled down version can't be made for APS-C though.

Secondly, a whole stop of S/N ratio improvement is highly unlikely, unless we're talking about out of the camera jpegs after being cooked by an even more heavy handed DIGIC dose of NR? As far as I know, modern sensors are closing in on the theoretically optimum QE, so we no longer have the headroom to make such massive gains (the 70D would have to be below 50% QE with the 7D II close to perfect to get a doubling on that metric).

And wifi as yet hasn't been introduced on any all magnesium bodied DSLR's yet. No reason why the antenna can't be located behind one of the plastic flaps (ports, battery, flash, screen etc), but this is new ground, so no reason to assume wifi is a given.

Other than that, yes, the wish list looks nice :)

164
EOS Bodies / Re: More EOS 7D Replacement Buzz Going Around [CR2]
« on: June 09, 2014, 04:22:12 PM »

This is entirely ignorance on my part as the only STM I own is the pancake, so I'll ask:

1) Do any still shooters who are shooting moving subjects use STM glass at all? 

2) Has STM focusing speed improved to catch up with USM speed? 

3) Does STM work well in Servo for moving subjects?

Please educate me, as I think my first go at STM with the pancake was not impressive on those three fronts.   That lens is a marvel, but only for static shots in my book.

Maybe more recent STM glass is better?

- A

Yeah, the 40 is very impressive bar the focus speed.

If you take STM as a replacement for the buzzy micro motor AF on cheap lenses, it's a nice improvement (although I can only guess about speed as I've never owned one of those lenses). It also doubles up as a nice damped AF system for video, which is why it may get introduced in replacements for lower end USM lenses.

I see no reason why the attributes of STM (slow, progressive AF suitable for natural looking pull focus on video) and those of USM (snappy, near instant AF for stills) can't be combined into one lens. In the meantime, I'd very much like high end photographers lenses to carry on with the current USM tech.

165
EOS Bodies / Re: More EOS 7D Replacement Buzz Going Around [CR2]
« on: June 09, 2014, 02:36:36 PM »
Just to throw this out there... If Dual pixel tech is ever going to hit full frame cameras like the 5d4 or 6d2 or 4d then FF will need a compatable STM lens too.

Good point. We already have the 40, but a slow zoom is the typical deployment of such technology. These EF-S zooms so far been optically very good, and very cheap. Does anyone see an EF 28-135/3.5-5.6 IS STM on the horizon? Nikon recently refreshed their budget full frame variable aperture zoom.

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