rparmar

Joined: 23rd February 2008

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rparmar
The second article is online. It covers our lens choice, testing method, processing, and motivation.

I've started to upload some of my test images, so they will be here tomorrow.

Comment by rparmar posted on My lens is better than yours :-) at 03/06/2013 - 23:43

rparmar
There are always more lenses. One of the objectives of this is to end up with fewer. May just be against the laws of physics.

Comment by rparmar posted on My lens is better than yours :-) at 03/06/2013 - 23:03

rparmar
froeschle wrote:
These are the only two lenses, which I would have been interested in
We may have to do another test of Zeiss versus Leica. First we have to finish this one though!

In the meantime, I have five articles on my blog. This search should find them.

The lens takes beautiful photos!

Comment by rparmar posted on My lens is better than yours :-) at 03/06/2013 - 21:21

rparmar
johnriley wrote:
You've explained your methodology, but not what the purpose of all this is?
I am sure I cannot speak fully for Robbie but here are some:

1. We are having fun with our tools.

2. We prefer to have some idea which tools are better than others. Rather than just flailing about in a pool of subjectivity.

3. We need to sell lenses and would like to know which to keep.

4. We might learn something from the responses we get back from other photographers.

5. We like challenging our own expectations. Don't you like challenging yours, John?

Comment by rparmar posted on My lens is better than yours :-) at 03/06/2013 - 21:13

rparmar
Algernon wrote:
I'm sure any of those lenses would be eminently suitable for photographing twigs
pengbai wrote:
Agreed! Not best subject to test on, and also for MF lenses, out of focus causes most "not sharp"...
I am not sure what subject people would prefer. Flowers have areas of texture, fine detail, and subtle tonal gradations. They have enough structural complexity to evaluate bokeh. They have areas easy to pinpoint for consistent focusing. They sit still. And people do take pictures of flowers!

Comment by rparmar posted on My lens is better than yours :-) at 03/06/2013 - 18:30

rparmar
johnriley wrote:
Most of these images are very soft, hardly anything in focus. Looking at the two stubs the A lens is crisper than the K lens and the Cosina somewhere in between. I think you'd have to live with these for a while because focusing is ultra critical and also getting the right image to use such as wide aperture effectively is a bit tricky.
Some background on our working methods, in advance of the full article. It's good to see comments and criticisms. We'll do our best to fill in information.

Robbie did the Pentax APS-C shots using live view at x10 on a K-5. I did the Olympus MFT shots on an E-PL2, also using the LCD at x10.

The shot was inside with no wind or disturbance. Light was completely diffuse and consistent, since we had an Irish overcast day. I have blinds on either side of the room to adjust for glare control. Once set I didn't touch these. There may be slight (1/3EV) highlight burns in the extreme edges of the frame, but otherwise no overexposure.

Underexposure is another matter since Pentax exposure consistency is, quite frankly, crap. Everyone who has used a K 50/1.2 knows this.

We used my Feisol tripod to ensure consistency through apertures on a given lens. There was slight frame movement as lenses were changed. There is no practical way to avoid that and neither does it matter much, if every shot is manually focused.

Our focal point was the stamen of the flower, the top left anther to be precise. DOF was so thin that sometimes the whole anther was not in focus at the same time!

I can't speak to the ultimate accuracy of our focus ability. We did not take multiple shots so we could select "the best" since no-one is paying us to do this and we also wanted to hang out and talk crap.

Comment by rparmar posted on My lens is better than yours :-) at 03/06/2013 - 18:25

rparmar
froeschle wrote:
Has the Leica a fitted LEITAX mount?
The Leica Macro-Elmarit has a mount fitted but I am not sure if it is Leitax brand. I bought it that way.

Unfortunately -- slaps self about head -- I forgot it in a drawer so we didn't test with it!

We did use six other lenses on two different camera systems. Considering we're not fanatical about this sort of thing (ha ha!) that seemed plenty.

Comment by rparmar posted on My lens is better than yours :-) at 03/06/2013 - 18:13

rparmar
johnwhit wrote:
Be nice to see a Voigtlander APO-Lanthar 125mm f/2.5 SL in the mix
Sure, can do! Do you have one you don't need?

Comment by rparmar posted on My lens is better than yours :-) at 03/06/2013 - 18:10

rparmar
Smeggypants wrote:
Could have saved yourself some typing RSI by just saying "I don't like F/1.2"
Yeah, it's true. I over-estimated my audience. Maybe next time I'll just grunt, point, and throw in a few emoticons.

Comment by rparmar posted on SMC A50mm f1.2 vs FA 43mm f1.9 limited at 29/05/2013 - 19:33

rparmar
Pentaxophile wrote:
Yes - the reason the K50 shot works is her pose and the good background, as well as the lens rendering - which is lovely. Not the f1.2 setting. In fact I suspect it was shot at more like f1.8 to f2?
f/2.8. No way could you get a shot that nice at f/1.2.

Pentaxophile wrote:
In terms of the 'pop', I mean when the background is pushed back by a selective narrow dof on the subject. I would agree that if you go for this look, the effect undone if there's a lot of glow / coma and lens aberrations.
Indeed. It's obvious when looking at a range of shots.

Algernon wrote:
The FA43 shot of the cat is far too contrasty and the whites are burnt out.
The idea was to get a contrasty look with that set, which isn't going to appeal. But no, nothing is burnt out. I am a maniac for exposing within latitude.

It's good to get feedback on what people like. My purpose was only to show decent stuff from both lenses. And of course to ensure the continued fame of Schweppes on the web.

Comment by rparmar posted on SMC A50mm f1.2 vs FA 43mm f1.9 limited at 29/05/2013 - 19:27

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