p.8 #1 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
Much more versatile for civilized travel, as members report the Batis 25mm also is. Distortion settles wider, at the wide edge after a steady pure barrel slope, no 21mm style kick up. Would be good to see if edge people lose all traces of 'melon head' syndrome - thinking crowded piazzas, interiors. Your images in this thread place human subjects at the rule of thirds.
p.8 #2 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
I have been studying the loCA issues this lens has. I have tried to get it visible in "normal pictures", but I keep failing. I have no problem getting lots of loCA if I behave like an idiot and overexpose sky and place out of focus branches against the clipping sky.
Here is my latest try. In 100% crops there are color errors, but in any practical application I have hard time a) noticing them b) getting bothered by them
Is it just me not seeing it? Do other people find color errors in this size (we are looking at 100% crops of 42Mpix sensor) to be major issue?
Full image, shoot f/2.8 as f/2.4 tends to be little harsh on boke for my taste. RAW was processed with CaptureOne without any kind of CA-correction (CaptureOne doesn't even yet have profile for Loxia 25):
RawDigger real RAW histogram shows that I'm ~0.7 stops shy from oversaturating sensor in the sky on both green channels:
Center crop - peeping pixels at 100% there clearly are color errors on high contrast edges, which are behind focus plane:
Extreme corner crop - also here we clearly have color errors on high contrast edges, which are behind focus plane:
p.8 #3 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
Samuli Vahonen wrote:
Is it just me not seeing it? Do other people find color errors in this size (we are looking at 100% crops of 42Mpix sensor) to be major issue?
I don't think anyone (including me) is saying the loCA is a major issue with this lens. It's just that the expectation was set very high because of the superb CA correction in the 21. The tests we see on this forum are often designed to find where lenses differ, but whether those differences matter depends on how and what you are shooting. I have been shooting the 21 and 25 interchangeably for my landscapes (usually around F8) and see no reason to prefer one over the other in terms of IQ.
p.8 #4 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
Fred Miranda wrote:
Definitely would be perfect for these locations. In fact, I will be traveling to Europe soon and will bring Lox 25/2.4, CV 40/1.2 and ZM 85/4 lenses.
Almost the same travel kit for NY next month
Zeiss 25 Loxia
CV 40
Zeiss 85 Loxia
That’s my new kit
My only one issue and it’s not a issue really is my PD Sling 5 I can fit that no problem but I can’t sneak in my Laowa 15. With that I have to jump to the PD 10 sling which than it’s too big for the street. They either need to make a PD 7 or I may buy a CV 12 back. I can get that in the very corner of the bag
Outside that I’m golden on my MF kit. It’s the AF kit I’m working on now.
p.8 #7 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
Samuli Vahonen wrote:
I have been studying the loCA issues this lens has. I have tried to get it visible in "normal pictures", but I keep failing. I have no problem getting lots of loCA if I behave like an idiot and overexpose sky and place out of focus branches against the clipping sky.
Here is my latest try. In 100% crops there are color errors, but in any practical application I have hard time a) noticing them b) getting bothered by them
Is it just me not seeing it? Do other people find color errors in this size (we are looking at 100% crops of 42Mpix sensor) to be major issue?
Full image, shoot f/2.8 as f/2.4 tends to be little harsh on boke for my taste. RAW was processed with CaptureOne without any kind of CA-correction (CaptureOne doesn't even yet have profile for Loxia 25):
p.8 #8 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
Fred thanks for the coma testing. I put my order in for the Loxia 25! Now my 3 lens MF kit will be the Loxia 25, CV40, Loxia 85, throw in the Batis 135 when going with 4 lenses.
p.8 #9 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
Chuck Coyne wrote:
Fred thanks for the coma testing. I put my order in for the Loxia 25! Now my 3 lens MF kit will be the Loxia 25, CV40, Loxia 85, throw in the Batis 135 when going with 4 lenses.
p.8 #10 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
Any idea how this Loxia might compare to the [much bigger] soon to be released Sigma 24mm? With both shot at 2.4 or 2.8? Aside from the obvious things like sunstars differences.
p.8 #11 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
I thought LoCA was evident n these big Bronco shots from Guy at f/2.8 (not wide open) and f/4). Look at the top white rail on the roof, white rails in foreground, "Unique Clothing..." lettering, and the bright wood panel the lettering is on. There looks to be some extra color (CA?) in the bright wood shadow areas? It just seem to take a certain amount of contrast in an area to bring it out.
p.8 #12 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
pdmphoto wrote:
I thought LoCA was evident n these big Bronco shots from Guy at f/2.8 (not wide open) and f/4). Look at the top white rail on the roof, white rails in foreground, "Unique Clothing..." lettering, and the bright wood panel the lettering is on. There looks to be some extra color (CA?) in the bright wood shadow areas? It just seem to take a certain amount of contrast in an area to bring it out.
p.8 #14 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
pdmphoto wrote:
I thought LoCA was evident n these big Bronco shots from Guy at f/2.8 (not wide open) and f/4). Look at the top white rail on the roof, white rails in foreground, "Unique Clothing..." lettering, and the bright wood panel the lettering is on. There looks to be some extra color (CA?) in the bright wood shadow areas? It just seem to take a certain amount of contrast in an area to bring it out.
I ignored this photo completely (for CA evaluation stuff) as all the white surfaces facing the sun are clearly overexposed.
In camera with sensor is using bayer CFA, the RAW-converter needs to calculate color to pixels based on their neighbour pixel (it's of course not just using the immediately nearest 8 pixels). When doing this and neighbour pixels are oversaturated there will be color errors.
p.8 #15 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
pdmphoto wrote:
I thought LoCA was evident n these big Bronco shots from Guy at f/2.8 (not wide open) and f/4). Look at the top white rail on the roof, white rails in foreground, "Unique Clothing..." lettering, and the bright wood panel the lettering is on. There looks to be some extra color (CA?) in the bright wood shadow areas? It just seem to take a certain amount of contrast in an area to bring it out.
p.8 #16 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
Fred Miranda wrote:
Here is the Loxia 25/2.4 @f/2.4 next to the FE 28/2 @f/5.6 towards the corners... (taken at different days)
Both lenses seem to be close to 26mm.
The resolution and contrast level is just not even comparable 2.5 stops apart. (especially towards the corners)
Are you testing the FE 28 with the distortion corrected? The lens was designed that way so depending on how far into the corner you are the lens designers may have intended for this to be cropped out. With compensation on (so the lens behaves like a 28mm) the FE isn't going to do as well as the Loxia but I believe it will do better than this.
p.8 #17 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
Looks like a great lens. Never could warm up to the 24mm focal length on FX as I've always had a 20mm-ish prime and ~40mm-ish prime in the bag and 24 or 25mm is just to close to the 20.
p.8 #18 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
I know many think the FE 28/2 performs better than demonstrated but unfortunately it’s not the case. (Distortion corrected or not)
Here it is against the FE 35/2.8 ZA: https://www.fredmiranda.com/forum/topic/1482312
Best,
Fred
joelRichards wrote:
Are you testing the FE 28 with the distortion corrected? The lens was designed that way so depending on how far into the corner you are the lens designers may have intended for this to be cropped out. With compensation on (so the lens behaves like a 28mm) the FE isn't going to do as well as the Loxia but I believe it will do better than this.
p.8 #19 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
I honestly have been through 4 or 5 of them and never had a great copy. Only lens worse has been the 24-70 f4 between renting and owning maybe 6 total. My Big Bronco tests the wall won every time.
p.8 #20 · Loxia 25mm f/2.4 Distagon Tests and Comparisons
That coma test more or less settles it for me. The Laowa 15 + Loxia 25 seem like an amazing landscape/astro combo, and the 25 is such a good gapping if you don't already have a 28. I know I'm just repeating everything that's been said already, but now I need to somehow find a way to fund the L25...
http://vahonen.info/photos/2018/Q2/20180418Vehoniemi,Kangasala/20180418_181721_ZL25F2-Full-7968x5320.png">
