p.1 #1 · 28 mm lens option for mono + full spectrum converted Sony
Howdy folks,
Quick question. Would love to see examples if they exist.
I know that native Sony sensors don't play very nice with wide angle Leica M lenses as they can produce corner smearing. But what happens when the Sony sensor get converted to monochrome and full spectrum sensitivity? Do Leica M lenses suddenly become the better (compared to native E-mount) option?
If there are still too many variables, what mono+full spectrum mod route did you choose, and what 28 mm lens gives you the best performance across the sensor?
p.1 #2 · 28 mm lens option for mono + full spectrum converted Sony
Zeiss ZE/ZF 28/2 is a marvel of a lens, playing well on both native Sony sensors and full spectrum converted ones. I went with Kolari for the conversion and use combinations of their internal magnetic filters and ones on the lens front. The Zeiss is among the smaller and lighter of their SLR series, but it is all metal, manual, and will require an adapter.
p.1 #3 · 28 mm lens option for mono + full spectrum converted Sony
Oh cool. I used to have a 28/2 ZF.2 and I liked it well enough though I sold it a long time ago. I see some R72 shots in that gallery, so I am assuming the lens has no IR hot spots either? Did you use Kolari for both the mono and the full spectrum conversion? Or are you doing the mono conversion in post?
p.1 #5 · 28 mm lens option for mono + full spectrum converted Sony
theHUN wrote:
Oh cool. I used to have a 28/2 ZF.2 and I liked it well enough though I sold it a long time ago. I see some R72 shots in that gallery, so I am assuming the lens has no IR hot spots either? Did you use Kolari for both the mono and the full spectrum conversion? Or are you doing the mono conversion in post?
You can get flare, if shooting into the sun, but hot spots are not a problem. I often use the Kolari Hot Spot Killer insert and can’t recall whether it was needed for optimal results or not.
p.1 #6 · 28 mm lens option for mono + full spectrum converted Sony
The thinner the stack of glass over the sensor, the more film-like response you get. So if your conversion includes getting a clear, hopefully AR coated filter to replicate the thickness of the actual stack, so it retains good performance with native mount lenses, then no, it won't help with RF wides at all.
p.1 #7 · 28 mm lens option for mono + full spectrum converted Sony
freaklikeme wrote:
The thinner the stack of glass over the sensor, the more film-like response you get. So if your conversion includes getting a clear, hopefully AR coated filter to replicate the thickness of the actual stack, so it retains good performance with native mount lenses, then no, it won't help with RF wides at all.
I understand all of this. The trouble is, the vendors are less explicit in their lingo and they practically never supply pixel-peep-level sample images.
Lifepixel for example says: "Unfortunately, most Sony full frame sensor mirrorless cameras that are converted to H-alpha or to Full Spectrum have the potential to exhibit edge distortion and soft focus in the edges with lenses wider than 35mm, especially at larger apertures. While this potentially occurs with native Sony lenses, the problem can be exacerbated by using aftermarket and/or adapted lenses. Stopping down to f/5.6 or smaller can help with this." Notice that nowhere do they say which lenses are good. In fact, they say that both Sony and adapted lenses can be bad.
p.1 #8 · 28 mm lens option for mono + full spectrum converted Sony
theHUN wrote:
I understand all of this. The trouble is, the vendors are less explicit in their lingo and they practically never supply pixel-peep-level sample images.
Lifepixel for example says: "Unfortunately, most Sony full frame sensor mirrorless cameras that are converted to H-alpha or to Full Spectrum have the potential to exhibit edge distortion and soft focus in the edges with lenses wider than 35mm, especially at larger apertures. While this potentially occurs with native Sony lenses, the problem can be exacerbated by using aftermarket and/or adapted lenses. Stopping down to f/5.6 or smaller can help with this." Notice that nowhere do they say which lenses are good. In fact, they say that both Sony and adapted lenses can be bad....Show more →
If you want a clear protective filter installed after they scrape off the CFA, I'm pretty sure you're going to have to work directly with one of them on getting as thin a piece as possible. It may be something they've handled in the past but don't advertise regularly.
