Fred Miranda wrote:
@sebboh@
I'm glad the Proxar 1m worked for you!
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This is off topic so I'll try to be brief.
I received the Leica 28/2.8 (Elmarit-R II) today and just compared it to the Zeiss 28/2 (Distagon ZF). Basically both excellent lenses with similar performance.
Hi Fred,
Any thoughts on how either of these lenses compare to the Contax G 28 with 1.5m PCX?
So from the lens forward. 46-55 step up, 55-52 step down than a 52 retaining ring than I added for a hood a 52-62 step up at the end. Now I could try a 52-60 maybe for the hood but 62 seems normal without any vignette .
I'm on a gig shooting about 40 portraits Tethered to laptop in C1 shooting with 4 strobes with 85 1.4 in crop mode. No internet but first victim of the day. Such a great setup with Sonys
Fred Miranda wrote:
@sebboh@
I'm glad the Proxar 1m worked for you!
just a typo correction: that's the optosigma PCX 1.5m reversed, not the proxar 1m. though a proxar was delivered to my work over the weekend, so i can try that out too.
sebboh wrote:
just a typo correction: that's the optosigma PCX 1.5m reversed, not the proxar 1m. though a proxar was delivered to my work over the weekend, so i can try that out too.
GMPhotography wrote:
So from the lens forward. 46-55 step up, 55-52 step down than a 52 retaining ring than I added for a hood a 52-62 step up at the end. Now I could try a 52-60 maybe for the hood but 62 seems normal without any vignette .
I'm on a gig shooting about 40 portraits Tethered to laptop in C1 shooting with 4 strobes with 85 1.4 in crop mode. No internet but first victim of the day. Such a great setup with Sonys
Looks great tho that guy's shirt collar is way too big....
navmannz wrote:
Would it be worth talking to an optician/spectacle dispenser - they're grinding lenses down to complex shapes all the time, and reducing a 50 mm diam to 48 circular should be a simple job for them.
-John
I've just followed up on this with an optical technician here in Hamilton, NZ, who advised that I would first need to ascertain whether the synthetic silicon compound used in the SLB-50-5000PM can be edge ground. If so, they have a machine that could easily downsize the filter to fit a 49mm filter ring.
It sounds like the ideal way to do it would be to find an older filter with a screw-in holder, and take in to them the filter mount, the new filter and the old removed filter - they would then simple grind the new filter to the same shape as the old one. A much more elegant solution than step up rings, etc., and it would mean that the existing hood would still be usable. I'm following up with the Optosigma agent in Oz and will keep you posted.
John I'm wondering if it would change the dynamics of the lens. My thought and certainly could be wrong here. But these lenses are curved if you ground the sides down would that make it have a smaller depth to the lens. Now we can maybe adjust for that with shims. The idea is great I'm just wondering if it would have some effect on its performance
I can't see an issue in theory, given that the general advice from the experts seems to be that the distance between the front element and the filter doesn't strongly influence results. Once I've got the filter I'll be able to test that, but all I would be doing is taking off 0.75 mm evenly around the perimeter, so it shouldn't affect the performance of that part of the lens that is in the optical path.
-John
ps. I was very impressed by the performance of your ZM 25, which I think would make a stunning little hiking lens - a bit more glass to grind off with that though, given the smaller filter size.
Yea the ZM 25 is really nice I need to go shot the darn thing but yes on the 25 the lens is my guess about 54 mm big and than going down to 46mm I'm just not sure. I guess the only thing I can thing of is infinity adjustment because the lens gets closer to to the front element. But hey I'm no optical genius either.
Just something that popped into my head.
Please keep us posted on this. I would not mind making it fit myself in a 46 filter thread
navmannz wrote:
I've just followed up on this with an optical technician here in Hamilton, NZ, who advised that I would first need to ascertain whether the synthetic silicon compound used in the SLB-50-5000PM can be edge ground. If so, they have a machine that could easily downsize the filter to fit a 49mm filter ring.
It sounds like the ideal way to do it would be to find an older filter with a screw-in holder, and take in to them the filter mount, the new filter and the old removed filter - they would then simple grind the new filter to the same shape as the old one. A much more elegant solution than step up rings, etc., and it would mean that the existing hood would still be usable. I'm following up with the Optosigma agent in Oz and will keep you posted.
It would be great if the lens could be grounded to 49mm and placed on a filter. Definitely an elegant solution that works with the original hood. Keep us updated.
GMPhotography wrote:
Yea the ZM 25 is really nice I need to go shot the darn thing but yes on the 25 the lens is my guess about 54 mm big and than going down to 46mm I'm just not sure. I guess the only thing I can thing of is infinity adjustment because the lens gets closer to to the front element. But hey I'm no optical genius either.
Just something that popped into my head.
Please keep us posted on this. I would not mind making it fit myself in a 46 filter thread
Guy,
Have you thought of using a step down ring as your ZM 25/2.8 "hood"?
So, instead of going 52mm to 62mm, you could try 52 to 49 or even 43mm. Going smaller works great as a hood since it blocks stray light the same way.
I have a 49mm to 37mm step down ring "hood" for my RX1RII and it works great. Just a thought.
Okay I had the 52-49 step down and it does vignette which I had a feeling it might, tried just a straight 52 and same problem so you do need a step up for the hood part. I could go maybe a 52-58 instead of a 52-62 and may get away without vignetting. I'll order one for 7 dollars worth a try. BTW i have a ton of these type of step up and step downs but always seems i never have the dang one I need.
Now you may get more elbow room with the ZM 35mm as its not as wide. Im just waiting on my close up 5m
GMPhotography wrote:
Okay I had the 52-49 step down and it does vignette which I had a feeling it might, tried just a straight 52 and same problem so you do need a step up for the hood part. I could go maybe a 52-58 instead of a 52-62 and may get away without vignetting. I'll order one for 7 dollars worth a try. BTW i have a ton of these type of step up and step downs but always seems i never have the dang one I need.
Now you may get more elbow room with the ZM 35mm as its not as wide. Im just waiting on my close up 5m...Show more →
It was worth a try. 25mm is too wide.
With the 35/1.4ZM, I tried adding an empty 52mm on top of the two rings (step-up and step-down) and it does not vignette. I will try 49mm and 43mm next.
It was worth the try for sure. This is the cheapest part of the whole assembly so a couple bucks here and there will save others the expense till we get it to be the best setup. I'm waiting on your whole ZM 35 setup to copy. Your doing me a favor there bud.
Jan 31, 2017 at 10:47 AM
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Fred Miranda wrote:
It was worth a try. 25mm is too wide.
With the 35/1.4ZM, I tried adding an empty 52mm on top of the two rings (step-up and step-down) and it does not vignette. I will try 49mm and 43mm next.
A step down to 49mm might be especially nice as you could maybe add the OEM hood again.
.