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The Sony A7 thread [Merged]

dmclalla

By dmclalla
in Digital Forum

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3D-Kraft.com

3D-Kraft.com

Posted
Posted
But, I get what you are saying: The A7R would be comparatively better if, you turned the internal correction off in the M240,

 

Rick, it does not help, when you generalize and pervert again and again, what I have written. I did not say that that A7R would be comparatively better if M240 correction is turned of. I only said this for particular lenses. There are also lenses that give better performance than any Leica M lens on M 240 nevertheless its correction is turned on or off.

 

and the M240 cost less

 

I said the opposite.

 

and you didn't use WA lenses on the A7R, and if they were not Leica M lenses, and you used the only 2 system Sony lenses, and you didn't care about poor edge performance...

 

I think nearly every one here (obviously except yourself) knows, that the very first indications, that the WATE will perform perfectly fine on the A7R were given by me on the internet. This article explicitely focuses on edge performance (also from other WA RF lenses that work well).

 

Ok, I'll wait and see if the new Zeiss FE 55/1.8 can produce good corners? As a bench mark (and not necessarily a great one) let's wait and see if, the Sony A7R with all of its 36MP of goodness and the new Zeiss FE lens can resolve in the corners at least 860Lp/IH as the old M240 (24MP) + the old Summilux 50mm/1.4 does.

 

I am quite sure, it will: Bokeh Dreams from 21mm to 135mm with Sony A7 & A7R (this article shows also many other lenses used on A7R including other M mount lenses like the 50 Summulix ASPH).

 

The bigger problem of the Summilux (I guess you talk about the ASPH version?) is the performance in the midrange between image center and border (at the 10mm ring on the MTF charts from Leica you see a significant dent that significantly affects IQ in that area - on every camera including the M 240).

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Ecaton

Ecaton

Posted
Posted
No, the funniest thing is that for years when a new camera has been out, KR has "reviwed" it and then forums go mental on bashing him.

 

I've said previously and I'll say it again, the guy's articles are entertaining and on the other hand he should be applauded for finding his own niche and making money of it. At times he also produces nice photos, not necessarely about xmas lights though ;-)

 

Also at time he has some valid points. His articles should be taken as personal opinions more than thorough reviews. If you bother to read between the lines and filter some crap, there are actually some valid points too. For example lots of historical data on Leica lenses.

 

First chapter in reply to CaptZoom, rest a personal point of view to KR.

 

//Juha

 

Sent from my iPad using Tapatalk HD

 

KR reviews cameras before they are out. Only Chuck Norris could do it faster.

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Guest polygamer

Guest polygamer

Posted
Posted

Hi, as requested above, SONY A7, Leica Tele-Elmar 4/135, f4, ISO 500, 1/60 sec,

JPEG ooc.

 

As I said above, my dear Elmar works beautifully at f4, giving a nice bokeh, on the other hand, you lose DOF...

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

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k-hawinkler

k-hawinkler

Posted
Posted

Advertisement (gone after registration)

 

 

Many thanks David for the info. Have you tried it?

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k-hawinkler

k-hawinkler

Posted
Posted

When I used the Universal Lens Calibrator ULC from CAPTURE ONE COMPLETE for the Leica Wide-Angle-Tri-Elmar WATE 16-18-21/4 lens on a Sony A7R camera I noticed the reference image was asymmetrical. Not good!

 

Hmm. CAPTURE ONE COMPLETE has ULC Tips for use. Simple use 1 tip states: "When taking a reference image, the board should be as close to the lens as possible. If possible, remove the lens hood." Hmm.

 

Well, the problem with the WATE is that the front lens element protrudes for 16 mm focal length if one removes the hood. Removing the hood makes it difficult to put the white plastic ULC board in front of the lens for accurate measurements. So I left the hood on.

 

Next observation is the lens hood has a triangular shaped hole only in the upper left hand corner so that the hood doesn't block the view too much when used with a rangefinder. Could it be that this hole in combination with the white plastic ULC board gives rise to the asymmetry in the resulting reference image?

 

Short answer: Yes, at least in part. Here is the proof for the wide open lens at 16 mm on A7R.

 

First, reference image for unmodified hood.

i-CWrXnJn.jpg

 

Second, reference image for modified hood, hole covered up with black electrician's tape.

i-qjLN3gX.jpg

 

Voilà, asymmetry partially explained. However, there still seems to be another smaller component, probably due to other factors like adapter and/or lens.

 

Next question, how should one use the hood in actual shooting, with or without hole?

Answer: Better with taped up hole in hood, reflecting the reference measurement situation.

But it probably doesn't make a significant difference. Reason being:

Without the white plastic ULC board in front of the lens, light entering from behind through the hole doesn't get reflected back towards the lens. :D

So, typical rangefinder use should be unproblematic. But when taking the reference image, the hole in the hood should be covered up with a non-reflecting material.

That would be my guess. ;)

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CheshireCat

CheshireCat

Posted
Posted
A beta tester is somebody, who tries a new product immediately before the introduction to the market. He should find, where the product has to be optimized a little bit.

Beta does not indicate a qualification of the product.

 

A beta product is feature-complete but untested, therefore some functionalities/subsystems are probably defective.

If beta testers (QA) find bugs, then the product is sent back to engineering and a new beta cycle starts.

If beta testers don't find bugs (or if the company decides to ignore known bugs ;)), then the product is called "final" and released. It should not contain bugs, but... nobody's perfect :)

 

There also is the term alpha test. This test is performed to check, if the design of a product fulfills the main requirements. If no, the product must be redesigned.

Jan

 

An alpha product is not even feature-complete. Meaning that some functionalities/subsystems are missing, and others are probably defective.

As soon as features are completed, then the product is moved to beta.

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k_g_wolf ✝

k_g_wolf ✝

Posted
Posted
Hi, as requested above, SONY A7, Leica Tele-Elmar 4/135, f4, ISO 500, 1/60 sec,

JPEG ooc.

 

As I said above, my dear Elmar works beautifully at f4, giving a nice bokeh, on the other hand, you lose DOF...

 

Excellent,

 

I esp. like this kind of background. Why do you need a sharp background when you have such

an impressive creature in the center of focus ??

 

Wonderful image, thx.

 

BTW, does the (googled) 135mm-ELMARIT fit the new SONY ???

 

 

Best

GEORG

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Nick De Marco

Nick De Marco

Posted
Posted

Hi Georg

 

Indeed it does. It was among some lenses I tested on my A7R the other night - results are here: Rangefinder Chronicles: Best Telephoto and Wide lenses for the Sony A7R test

 

It works very nicely on it in fact - although (as you know) it is BIG & HEAVY!!

 

Attached is a photo of one of my Leica IIIs taken with the Elmarit at f2.8 (fucus on the nearest part of camera)

 

Nick

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

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k_g_wolf ✝

k_g_wolf ✝

Posted
Posted

Great!

 

And thank you for this photo, Nick.

 

Another reason gone why not to buy this bl. new camera. There is a bunch of R- lenses waiting here to be kissed to life again, but for a genuine LEICA-M aficionado it´s more important, that all the M-lens treasures can be utilzed.

 

I had the Tele-Elmar for 43 years (!), bought new, it never failed, never needed service, still working smooth. I decided to get the googled ELMARIT 4 weeks ago to allow the TE a bit of a pensioners life. I´am VERY pleased what the ELMARIT does on the M9. The blurred backgrounds you get are phantastic.

 

The transition from sharp parts of the picture to the blurred background is very nicely shown in photograph as well.

Thx again.

 

 

Best

GEORG

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algrove

algrove

Posted
Posted

Rich

I like those images. To be clear for me which adapter did you use? Did you use the electric cable release or 10 sec delay or hand held? If hand held at what speed, please? Thanks.

 

I like the look of snow from here where we might hit over 80 degrees today.

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naturephoto1

naturephoto1

Posted
Posted
Rich

I like those images. To be clear for me which adapter did you use? Did you use the electric cable release or 10 sec delay or hand held? If hand held at what speed, please? Thanks.

 

I like the look of snow from here where we might hit over 80 degrees today.

 

Hi Lou,

 

My adapter for the Leica R lenses is the Novoflex Leica R to NEX adapter. All of the images were shot with the Sony Electronic Remoten cable release and all images were tripod mounted. I believe that the first three images were shot at f11 and the other 2 images at at f8 or f11. The images were stopped down for DOF; the lens is quite sharp open much more than f8. Shutter speeds for the images ranged between about 1/3 to 1/15 second.

 

By the way, I have 2 more lenses on their way to me. I have the R 28mm f2.8 Elmarit V2 (my 17th R lens coming) and the Contax (C/Y) 21mm f2.8 Distagon coming. Unfortunately the Leica M lenses didn't cut it for the 21mm (the 21 Summilux and the WATE were more money than I wanted to spend) and I decided not to deal with the issues with the M 28mm lenses for the a7r.

 

Rich

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jedi996sps

jedi996sps

Posted
Posted
It installs ok but will take time to set up for any specific lens.

 

Hi,

Am wondering how the app will know which aperture has been used and presumably if you wanted, you could set up multiple corrections ie one for each f stop?... am thinking of the varying vignetting when using an M 50lux

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viramati

viramati

Posted
Posted

Went to pick up a lens yesterday and had an interesting conversation with one of the leica guys in the Mayfair service dept about the new Sony A7r and he showed me this website.

Diffraction Limited Photography: Pixel Size, Aperture and Airy Disks

You will see that if you dial in for the D800 (same size sensor as the A7R) you will start getting diffraction at F8 and above!!!.

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