April 21, 2014, 12:46:29 PM

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Topics - Eldar

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1
Lenses / Bokeh onion rings
« on: April 14, 2014, 02:46:43 AM »
The Zeiss Otus 55 f1.4 is a phenomenal lens, but it has been criticized for having onion ring bokeh. I have numerous examples of this, some posted over at this thread:

http://www.canonrumors.com/forum/index.php?topic=18169.msg387033#new

Attached are 4 examples. The first one has AC light bulbs. The second one is candle lights. The third is Christmas tree lights and reflections from the decorations on the tree and the fourth is a DC lightbulb.

As you can see, the first and third have the rings, the other two does not. I do not understand why this happens, but it seems to be related to AC light vs. natural or DC light.

I have tried this with numerous lenses (Otus, Sigma 35/1.4A, 85/1.2L II, 24-70/2.8L II) with the same result. The sharper the lens, the more obvious it becomes. So to me it seems that this phenomena has its cause outside of the lens.

Can someone please explain what this is.

2
Lighting / Flash bracket for use with 600mm f4L IS II
« on: April 09, 2014, 03:41:18 AM »
I have been in a couple of situations where I would have liked to have a flash with my 600. I have looked at a variety of alternatives, but it is not easy to decide what the better solution is. So, since there are lots of experienced 600mm shooters on this forum, I´m asking your for advice. Which flash brackets do you have/recommend?

I have RRS L-brackets for my cameras and plates/feet for my lenses.

3
Abstract / High resolution Moon image
« on: March 20, 2014, 05:33:31 PM »
Here is something extraordinary for the pixel peepers:
http://lroc.sese.asu.edu/gigapan/
867 giga pixles!

5
EOS Bodies / Anything to report from the Olympics?
« on: February 17, 2014, 04:32:48 AM »
It may be that I have missed something, but I am surprised that we have not seen any info or spy images of new bodies and/or lenses from the Olympics. If we are to expect any interesting bodies from 7DII and above, during this year, I would have expected them to be field tested in Russia.


6
EOS Bodies - For Stills / 1DX focusing screens
« on: February 06, 2014, 03:22:43 AM »
I have been searching the web for some more indepth views on alternative focusing screens for the 1DX. Manual focus with fast primes wide open is quite challenging with the standard screen. I thought the Ec-S screen would be the best choice, but then someone whispered Ec-A and Ec-B. Noen of them seem to be supported by Canon. They are fairly cheap, so one option would be to buy them all and try them out, but I would like to qualify the options first.

How much better are they for manual focus, compared to standard screen with focus indicators?

To make it practical, I need to use this focusing screen also with other lenses, like the 600 f4L with 1.4xIII extender, so AF speed and viewfinder brightness are issues of interest.

Does anyone have any experience with either of these, or know of any good papers on the topic?

7
Lenses / Canon FD 150-600mm F5.6 'L' PL Mount
« on: January 29, 2014, 09:09:48 AM »
I found this add today for a lens you don´t see every day:
(It´s in rather poor Norwegian, but the seller seem to be English)

http://www.finn.no/finn/torget/annonse?finnkode=46412958&searchQuery=canon

For anyone with an interest:

Here is the official line on the lens.
http://www.mir.com.my/rb/photography/companies/canon/fdresources/fdlenses/fdzooms/150600.htm

Focal length: 150-600mm
Aperture ratio: 1:5.6
Lens Construction: 15 groups with 19 elements
(including 8 UD glass elements)
Coating: S.S.C. (super spectra coating)
Angles of view: Diagonal: 16 20' - 4 10' Vertical: 9 10'ñ2 20'
Horizontal: 18 40' - 3 30'
Distance scale: (m) 3 (Magnification 0.07 x at 150mm. 0.26x at 600mm) to 100.OO (ft);
Focusing mechanism: Rotation of knob
Zooming: Sliding of knob, mechanical compensation system
Minimum aperture: f/32. A
Diaphragm: Automatic
Filter type: Rear section biterholder, drop in type (with 34 mm exclusive filter Regular 1X)
Hood: Built-in type
Cap: Exclusive (CF2-0716)
Function: Auto Aperture, Full aperture metering (AE operation when used with ALL Canon automatic SLR cameras.
Length x max. diameter: 468mm x 128mm
Weight: 4,260g.

8
Third Party Manufacturers / Polarizing filter for Zeiss 15mm f2.8
« on: January 16, 2014, 08:26:44 AM »
I'm going to buy a 95mm circular polarizing filter for my Zeiss Distagon 15mm f2.8. The only one I know will work is the Zeiss. But $509 (B&H) is stiff enough to look for alternaitves.

Has anyone experience with any of the other suppliers on that specific lens?

9
Canon General / Canon outperforms Japanese peers in patents, again
« on: January 15, 2014, 09:04:36 AM »
To those who are worried that Canon has stopped being innovative;

Canon has ranked amongst the top 5 patent holders in the US for more than 25 years. In 2013 Canon ranked as No.3 over all, with a total of 3.825 patents, which is an all time high. Canon has been the highest ranked Japanese company for the last 9 years.

http://www.canonwatch.com/canon-top-japanese-company-usa-patent-ranking-9th-year/#more-18388

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EOS Bodies - For Stills / Choice of focusing screens on the 1DX
« on: January 11, 2014, 03:47:36 AM »
I know this has been debated elsewhere, but I got lost in all the threads.

My use of manual focus for the last years have been limited to tripod mounted tilt&shift or macro, primarily using live view. But since I got the Otus and now also the 15mm Zeiss, I need to improve my ability to focus manually through the view finder. I am also eagerly awaiting the next Otus family members, having seen the phenomenal quality for the 55/1.4, so manual focus may be more and more relevant for me.

I currently use the focus indicators, but that distracts me and shifts attention from motive to focus. I would therefore like to have a precision matte focusing screen for that purpose and I believe the Ec-S may be it. I thought Canon didn´t support that for the 1DX, but according to B&H they do.

So two questions;

1: Does anyone have experience using this focusing screen with the 1DX and is it any good?

2: Since I don´t want to swap focusing screens back and forth, is it still possible to use an f4 or f5.6 lens (like the 600 4L or 200-400 with the extender in) with the Ec-S in place or will the viewer be too dark and grainy?

An alternative could be to get a 1DsIII body for use with the Zeiss lenses, but I am not very tempted by that option.

11
Here´s confirmation that the Otus 55/1.4 will be followed by an 85/1.4. Zeiss have confirmed on their Facebook that the 85 will be available in 2014. In the video attached, they also say that a unspecific wide angel/1.4 will follow. It their quality is anything like the 55/1.4, I´ll que up for them.

Carl Zeiss 55mm f/1.4 Distagon, Sony NEX, and 135mm f/2.0 APO-Sonnar Small | Large

12
Software & Accessories / EIZO ColorEdge CG276W for iMac
« on: January 02, 2014, 06:48:04 AM »
I have an iMac 27" (2010 model), where the monitor is just not acceptable. Brightness is very uneven and it covers only about 70% fo AdobeRGB. I have been looking for a new monitor and it seems the Eizo ColorEdge CG276W is an excellent option. Has anyone any experience with this monitor and preferably used it on an iMac?

13
Lenses / Handheld vs. tripod with the Great Whites
« on: November 14, 2013, 07:29:14 AM »
I posted this on another thread, but I think it works well enough to repost it.

We all struggle with getting maximum movability with our long tele lenses. I used to handhold a lot, but a 600mm f4L IS II, with a 1.4xIII extender on a 1DX body is quite a load. But as an old boy scout, who used to carry the flag in parades, I thought of using a flag bandoleer, which I did.

I am still working on a solution to strap the lens to the shoulder straps of the bandoleer, so it can hang in a stable position while I operate another body.

It is cheap small and very efficient.

14
Speedlites, Printers, Accessories / Choosing the right tripod
« on: September 21, 2013, 05:56:23 PM »
I have a siste who has become a really enthusiastic photographer. And, a consequence of that is that, she´s asking me for advice. And I realize that I have different thresholds in almost any department compared to most others.

At the moment she has a 6D, with a 24-105 f4L IS. She is looking for a portrait lens and she will (probably) get a 70-300L. Then she asked me, what tripod should I buy. And I thought of the very nice Gitzo, RRS and so forth alternatives out there. But in all fairness, that is overkill. So the question I´d like some help with is, what is a good tripod/head package for a newbie, which may last (!)

Benro, Manfrotto, Slik ... I know there are lots of alternatives, but I would like some good tip.

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Lenses / 400mm f2.8L IS II or 600mm f4L IS II?
« on: September 14, 2013, 05:37:28 PM »
At the moment I have both of these lenses, and they are both extraordinary. But I'm not a a pro and it is a lot of money, so my common sense tells me to just keep one. But which one?

I do sports, wildlife and birds. And I also use the 1.4xIII and 2xIII extendres. Well, I don't use the 2xIII on the 600mm, because of the reduced AF functionality and 1200mm is difficult for anything but fairly stationary objects.

So, what would your reasoning and decision be, if you had both, but could only keep one?

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