tsdevine wrote:
My working theory, which I believe realVivek will maybe correct or provide different insight into, is that Sony's sensor stack filters (in general) below 409nm. Other camera manufacturers filter at higher frequencies, therefore allowing less UV spectrum though. Some lens manufacturers may not realize this, being used to dealing with Canon, Nikon, etc. And even though Sony licensed the mount specs, they may not have not gotten into this type of detail.
I don't know if certain lenses transmit more.....or in reality it wasn't realized at design time and attention wasn't paid in how the optics performed at near 410nm frequencies because it was believed the sensor stack would take care of it.
But there are few multicoated UV filters that filter out UV at 410nm or above. The Zeiss happens to be one of them and does seem to reduce the effect.
I had been using profiles I created with Cornerfix, but that was still a little painful. Somewhere along the way, C1 lost me....I just struggle with the software's interface. No offense to those who like it, that's on me. I know that the non CC version of Lightroom has flat field, so that's an option as well.
Also, I don't think the magenta shading I see is 100% consistent, it depends on the light.
olalafoto wrote:
Most lenses have color shift, which can be corrected by LCC+Capture one
Most recent Cosina releases have been coming out in late part of their respective release months and Cosina already announced that the 35/2 APO-Lanthar for E-mount would come out in April, so I guess it most likely comes out in late April.
Release dates for their new lens releases since February 2020 until March 2021:
2020:
NOKTON 21mm F1.4 Aspherical VM 2/27
NOKTON 35mm F1.2 Aspherical III VM 3/26
NOKTON 60mm F0.95 4/24
NOKTON 35mm F1.2 Aspherical SE 5/27
NOKTON 40mm F1.2 Aspherical SE 6/24
NOKTON 50mm F1.2 Aspherical SE 7/23
NOKTON Vintage Line 50mm F1.5 Aspherical II VM 10/22
SUPER NOKTON 29mm F0.8 Aspherical Micro Four Thirds 12/10
2021:
APO-LANTHAR 50mm F2 Aspherical VM 1/27
ULTRON Vintage Line 35mm F2 Aspherical Type II VM 3/19
APO-LANTHAR 35mm F2 Aspherical VM 3/25
So most of the release dates were in late part of the month, and only December was an exception since it usually doesn't make as much sense to release in late December due to holiday season. And in March they are going to release twice so the first release is a bit earlier. I think they also usually want to have some gap between releases to handle lens production runs etc. so it will make sense to have some gap (e.g. about 1 month) between 35/2 APO VM and 35/2 E-mount.
tsdevine wrote:
My working theory, which I believe realVivek will maybe correct or provide different insight into, is that Sony's sensor stack filters (in general) below 409nm. Other camera manufacturers filter at higher frequencies, therefore allowing less UV spectrum though. Some lens manufacturers may not realize this, being used to dealing with Canon, Nikon, etc. And even though Sony licensed the mount specs, they may not have not gotten into this type of detail.
I don't know if certain lenses transmit more.....or in reality it wasn't realized at design time and attention wasn't paid in how the optics performed at near 410nm frequencies because it was believed the sensor stack would take care of it.
But there are few multicoated UV filters that filter out UV at 410nm or above. The Zeiss happens to be one of them and does seem to reduce the effect.
Below is a short exchange I had with Astronomik regarding their L2/3 filters (UV/IR cut for both screw-on lens filters and drop-in sensor filters).
Me:
Is it possible this L-2 can reduce the chromatic aberration and/or the hazy look for some lenses at minimum focus distance and wide apertures? The reason I ask – it seems to greatly sharpen and clear up images at minimum focus distance with the RF 15-35 when shot at 35mm and wide open at f/2.8 where the lens is known to be a bit soft.
Astronomik:
The L-2 blocks UV and IR. IR won't be a problem as it's blocked inside the camera very well too, but UV might be a reason, it will cause hazziness with several lenses. Using the L-3 will improve this even more, as it blocks more UV. (Actually the L-3 is designed to improve sharpness of lenses with pure color correction in astronomy, but it will work with any other normal lens too.)
^ Point being the general advice you hear about UV filters "doing nothing for digital" are not true for every lens/sensor combination.
Using something like the Zeiss T* UV filter, B+W IR/UV, or Astronomik L2/L3 can be great "IQ insurance" if you're a fan of using protective filters anyway.
Thanks, I saw that drop in filter, but I also saw (I'd have to find the link) where it is 1mm thick. I believe that would be thick enough as to cause some optical issues with some lenses. I'm guessing those lenses with more severe ray angles might be impacted by glass that thick, but for telephotos which might have a less severe ray angle it may have negligible impact. (Probably over generalizing....) I know there are some drop in filters for the Sigma 14-24 and the thicker ones sort of muck with the corner performance.
That would probably be my biggest concern.
highdesertmesa wrote:
Below is a short exchange I had with Astronomik regarding their L2/3 filters (UV/IR cut for both screw-on lens filters and drop-in sensor filters).
Me:
Is it possible this L-2 can reduce the chromatic aberration and/or the hazy look for some lenses at minimum focus distance and wide apertures? The reason I ask – it seems to greatly sharpen and clear up images at minimum focus distance with the RF 15-35 when shot at 35mm and wide open at f/2.8 where the lens is known to be a bit soft.
Astronomik:
The L-2 blocks UV and IR. IR won't be a problem as it's blocked inside the camera very well too, but UV might be a reason, it will cause hazziness with several lenses. Using the L-3 will improve this even more, as it blocks more UV. (Actually the L-3 is designed to improve sharpness of lenses with pure color correction in astronomy, but it will work with any other normal lens too.)
^ Point being the general advice you hear about UV filters "doing nothing for digital" are not true for every lens/sensor combination.
Using something like the Zeiss T* UV filter, B+W IR/UV, or Astronomik L2/L3 can be great "IQ insurance" if you're a fan of using protective filters anyway....Show more →
tsdevine wrote:
Thanks, I saw that drop in filter, but I also saw (I'd have to find the link) where it is 1mm thick. I believe that would be thick enough as to cause some optical issues with some lenses. I'm guessing those lenses with more severe ray angles might be impacted by glass that thick, but for telephotos which might have a less severe ray angle it may have negligible impact. (Probably over generalizing....) I know there are some drop in filters for the Sigma 14-24 and the thicker ones sort of muck with the corner performance.
Yeah, you definitely don't want to fix one problem and cause another one. I didn't see any loss of corner sharpness on the RF 15-35 at 15mm, but it might be different for Sony sensors and/or for lenses designed for the M sensor. The biggest thing to watch out for on the drop-ins are lenses that move the rear elements far back enough to make contact. The RF 35 1.8 macro cannot be used with the drop-in, but so far that's the only RF lens that can hit the filter.
Thanks, this is really useful information. I had seen that filter but sort of ruled it out due to thickness. But based on your firsthand experience (granted different mount, but still firsthand) means I probably shouldn't rule it out completely.
highdesertmesa wrote:
Yeah, you definitely don't want to fix one problem and cause another one. I didn't see any loss of corner sharpness on the RF 15-35 at 15mm, but it might be different for Sony sensors and/or for lenses designed for the M sensor. The biggest thing to watch out for on the drop-ins are lenses that move the rear elements far back enough to make contact. The RF 35 1.8 macro cannot be used with the drop-in, but so far that's the only RF lens that can hit the filter.
For my Leica M film camera, I want manual, and this lens would match up great with my M5, and digital M if I ever get the courage to buy one again. For adapted, that is a whole other story.
Karl Witt wrote:
In regards to the statement of buying a UV filter for this lens.............
Why do we put inferior glass in front of superior glass? Doesn’t any glass degrade the quality of what the manufacturer worked so hard to achieve??
I’ve not fully understood the benefits of filters.
OK now I’m gonna get a lesson
Karl😎
We don't.
At least I don't.
Any filter I own is easily the optical equal of the lens's elements
I will say, this is going to be a tough choice for me. I recently picked up the Sony 135 GM and the Voigtlander 50mm APO Lanthar, and absolutely love both lenses. So much so that I don't know which one of the 35mm I will pick up. Certainly the faster Sony will be a boon for astro work, but given how fantastic the APO lenses have been wide open, I might be willing to give up a stop and a half of light for the Voigtlander look. I really wish review copies would hit the internet folk by now to get an idea of how the performance is so I can make my decision and place my pre-order.
I really do wish Voigtlander would make a 21mm and 28mm APO though...
Yeah I think I’m in holdout mode for a wider APO option. Going with the GM for now at 35.
motorhead9999 wrote:
I will say, this is going to be a tough choice for me. I recently picked up the Sony 135 GM and the Voigtlander 50mm APO Lanthar, and absolutely love both lenses. So much so that I don't know which one of the 35mm I will pick up. Certainly the faster Sony will be a boon for astro work, but given how fantastic the APO lenses have been wide open, I might be willing to give up a stop and a half of light for the Voigtlander look. I really wish review copies would hit the internet folk by now to get an idea of how the performance is so I can make my decision and place my pre-order.
I really do wish Voigtlander would make a 21mm and 28mm APO though......Show more →
motorhead9999 wrote:
I will say, this is going to be a tough choice for me. I recently picked up the Sony 135 GM and the Voigtlander 50mm APO Lanthar, and absolutely love both lenses. So much so that I don't know which one of the 35mm I will pick up. Certainly the faster Sony will be a boon for astro work, but given how fantastic the APO lenses have been wide open, I might be willing to give up a stop and a half of light for the Voigtlander look. I really wish review copies would hit the internet folk by now to get an idea of how the performance is so I can make my decision and place my pre-order.
I really do wish Voigtlander would make a 21mm and 28mm APO though......Show more →
