J.K.T.

J.K.T.

Lives in Finland Finland
Works as a NOT photography
Joined on Feb 14, 2004
About me:

Canon: 7D, 40D, EF 35/2, EF-S 60/2.8, EF-S 17-55/2.8, MP-E65, 100/2.8 L, MT-24EX
Sigma: EF 500 & 530 DG Super
Tamron: AF SP 28-75/2.8... AF SP 180/3.5...
Tokina: 12-24/4

Comments

Total: 6, showing: 1 – 6

Canon has phase detection AF on CMOS and this has contrast detect? This is where it belonged.

I don't really mind dropping the OVF, but the EVF should have been there. An add-on is very unlikely to be robust enough. The OVF isn't necessary as it excels in speed and manual focus and neither are priorities for this camera anyway. I don't carry reading glasses when walking and without them the screen is rather hopeless.

Removing manual dials is a really bad idea too. I still love the interface of ancient Minolta DiMAGE A1 - the EVF shoved real-time approximation of the result and a histogram as well and I had both speed and aperture on dials. Similar done with current technology should be quite interesting.

This one I'll pass.

Direct link | Posted on Feb 12, 2014 at 08:05 UTC as 50th comment | 1 reply
On Tamron to develop 150-600mm F5-6.3 ultra-telephoto zoom article (193 comments in total)
In reply to:

SushiEater: It will focus on Canon crop bodies even at F6.3 by telling the camera that it is F5.6

In that case I need to start saving. :)

Direct link | Posted on Nov 7, 2013 at 08:15 UTC
On Tamron to develop 150-600mm F5-6.3 ultra-telephoto zoom article (193 comments in total)

As someone shooting with Canon crop bodies I really would have appreciated f/5.6 at tele end - even at the price of somewhat shorter max length. Otherwise...

Direct link | Posted on Nov 7, 2013 at 07:17 UTC as 74th comment | 3 replies
In reply to:

Joe Ogiba: The EF lens adapter cost $200 more than the Pentax K-mount-K-01 adapter and doesn't even have IS. No flash ? The K-01 works with 25 million K-mount lenses made since the mid 70's and Canon DSLRs don't even work with their own FD mount lenses from the mid 80's without an adapter.
http://www.pentaxforums.com/forums/non-pentax-cameras-canon-nikon-etc/193175-maybe-k-01-not-crazy.html#post2032269

FD adapter would be nice, but to offer anything new it would have to include aperture control. Canon could do that, but won't. Even if they did, I couldn't afford theirs. :) I doubt others will bother to solve the electronic <-> mechanical problem it poses.

Direct link | Posted on Jul 24, 2012 at 06:49 UTC

I simply can't figure out what is the point of having both this and 150/2.8 OS.

Direct link | Posted on Jan 10, 2012 at 07:43 UTC as 4th comment | 2 replies
On Macro photography: Understanding magnification article (115 comments in total)
In reply to:

OneGuy: A widely available parameter on a given camera is the 'minimum focusing distance.' Knowing the sensor size, can I calculate the (optical) magnification just from this parameter? Or do I have to use a ruler at that distance to get the object size?

I checked (quickly) DPR specs on Oly PM1 and did not find the optical magnification ratio (proportion) there -- only 'Live View Magnification." Is this the same thing? If not, what would be the benefit of including the optical magnification on the DPR spec sheet?

You'll need the ruler too. If you knew the focal length and the minimum distance, you could calculate the magnification. Unfortunately the given focal lengths are for infinity focus. The focal length at minimum focus can be (and usually is) different.

Direct link | Posted on Nov 29, 2011 at 08:29 UTC
Total: 6, showing: 1 – 6