I wanted to share my thoughts on the A*135, since we don't often hear about this lens and I feel it deserves more mention here. This is actually a consolidation of my posts on the "other" forum, so it may look familiar to some of you. I've gone ahead and put everything in one post, and cleaned up some of the writing as well. I hope you find this interesting, and do feel free to add your comments or questions.
Firstly, I'll say that this lens impresses me so very much. It is super-sharp wide-open. Some have stated that it is slightly soft wide-open, but I disagree - it is very sharp at all apertures. At wide apertures, focus does become very critical, so one must focus carefully for the sharpest results. Also, colours and contrast are very good wide-open. The only weakness that I can see at this aperture is what appears to be some PF which can be minimal to problematic if shot under high-contrast lighting, depending on the scene (in low-contrast lighting, there is no PF). However, this PF pretty much disappears by f2.5 or f2.8.
Further testing has revealed that this PF is actually bokeh CA (purple haloing in front of plane of focus, green haloing behind), which is pretty much expected for fast lenses, but what is a bit unusual here is that the purple has a tendency to "bloom".
The good news is that since it is focus-related, this PF can be controlled/eliminated - just make sure you don't have back-focused high-contrast elements. On the otherhand, unlike the K135/2.5, there is no lateral CA whatsoever, at least none that I have been able to find so far (the PF exhibited by this lens is not to be confused with lateral CA).
Using a rubber hood may help things, as the front element is pretty massive and the built-in hood does little to block stray light. However, I have not yet bothered to as the performance wide-open is so good as-is.
To start, here is a shot to illustrate the sharpness wide-open (
link to full-sized image is here:):
This was shot wide-open (f1.8) with my K20D in very crappy lighting, hence the use of ISO800. I realize that using ISO100 would better illustrate the abilities of this lens, but given the conditions I didn't have much choice. I'm actually quite surprised by how well the AWB handled this. Also note the nice colours and contrast (given the scene) - I wish my A50/1.4 looked this good wide-open!
Converted from RAW using PPL at default settings (sharpness 0), natural image tone, and all NR disabled. No PP aside from raw conversion. Image resized using IrfanView (the resizing operation applied some sharpening).
Here's a 100% crop of the above (there is no sharpening applied here):
I cannot see any signs of softness; yes, there's some PF in the crop, but I don't think it's too objectionable. What do you think?
This next set of photos of fall foliage and wild flowers was shot at f2.2 and should give you a good idea of the OOF rendering:
First, let's start with the leaves...
And now for some flowers...
Here's a different take on the above (which one do you like better?):
Please forgive the slightly processed look - I gave these more sharpening than usual as I didn't nail the focus in all of the shots, and I also bumped the contrast to compensate for the very flat lighting (a dull day near sundown).
Workflow: RAW files processed using PPL, sharpening +1, contrast +2, cloudy WB preset, natural image tone. JPGs resized to 1024 width using Irfanview, with further sharpening applied.
This last set was taken under bright lighting (in fact, it was a bit harsh) at mid-apertures, IIRC (the exif should be intact, if not just let me know). And also a reminder that all of the photos shown here were taken with the natural image tone preset, so the colours may lack the "pop" that some of you might prefer:
Nice "3D effect" here (
link to full-sized version here:):
This one might look better in B&W (what do you think?) (
link to full-sized version here:):
Great Wall ruins (
link to full-sized version here:):
Here's a 100% non-sharpened crop of the previous image (did I mention how sharp this lens is?):
We can see a "3D" effect in the first shot, and there is a vibrancy I have not seen with any of my other lenses. The lighting was quite harsh in the second shot; not much to say here besides that I don't usually get keepers in this kind of lighting - note how well the contrast and colours are maintained. The third shot (and 100% crop) demonstrates the excellent long distance performance.
In fact, the long distance performance is so good that the A*135 may have obsoleted my FA*200/2.8! I will be doing some tests when I get a chance to see how close the A*135 comes to the FA*200 when shooting the same scene at the same distance (ie- compare A*135 upsized and cropped to the FA*200). Even better would be to pair the A*135 with a 1.4x TC or the AFA 1.7x and pit it against the FA*200, but this will have to wait for another day as I do not currently have a compatible TC in my possession.
In conclusion, this is a surprisingly versatile lens given some of its unique traits - unbelievable wide-open sharpness, speed (f1.8) and excellent OOF rendering (though watch out for PF in high-contrast scenes using wide apertures). The focal length on APS-C is a bit awkward, however, being a bit too long for portraits and not long enough for birds. But if you have the working distance, it excels and is the ticket if you're looking for a fast, short (but heavy) tele. It also has decent close focusing performance, so you can still use it to get interesting shots of flowers and things like that. My previous favourite 135 was the old K135/2.5, but the A*135 is in a different category altogether - it is sharper, faster, and better in the CA department.
The unfortunate reality to this is the rarity and price when copies do show up for sale. It seems that many copies have ended up in the hands of collectors, as there are surprisingly few sample images to be found online. I feel that given its performance, this lens is really deserving of more usage.
This lens really is one-of-a kind, and there aren't many alternatives available. The Voigtlander SL125/2.5 Apo Lanthar Macro is often mentioned as an alternative, and it is notable for its lack of CA
and PF, however based on Jim King's comparison it does not seen to match the sharpness of the A*135, at least not at longer distances. The Voigtlander is also about a stop slower. However, many owners do swear by this lens. But unfortunately, it too is out of production and I'd think that used copies will not be cheap.
Those of you feeling the LBA itch right now should determine if the special properties of the A*135 are worth the price of admission - I hope my photos have given you an idea of what this lens is capable of. If this really is the one, then you should try to find a well-worn or even damaged copy, so that you can get it for a discounted price (if you get a good copy, you will be too scared to use it!). Even some glass damage should be acceptable, assuming you can get the price down enough, as minor damage/blemishes will usually not affect the image noticeably. Also, with this lens you should have no problems selling even a damaged copy if you decide not to keep it in the future. Alternatively, you can also try looking for the Voigtlander SL125, though this lens will also not be cheap. However, it should be priced more reasonably than the A*135.
Last edited by photogerald; 04-25-2010 at 08:21 PM.
Reason: Added some full-sized images