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Old 6 Days Ago   #1601
mpaniagua
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Quote:
Originally Posted by Huss View Post
Problem is that can be tough outside w a max shutter speed of 1/1000 sec. Even with an ND filter.
Not really. Panatomic was available then (asa32). That would be about f/2.8 at 1000th so about 500 ay f/1.4 on shadow. It was pretty different reality back then.
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Old 6 Days Ago   #1602
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Quote:
Originally Posted by retinax View Post
... but I didn't expect it to be this visible, especially at f/5.6 or 8. Must be an effect of a strange, complex field curvature?
This is typical of a 35mm lens. I take this and use it to my advantage.
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Old 6 Days Ago   #1603
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Quote:
Originally Posted by retinax View Post
Ed, is it even toward all four corners?
It's a typical rendition of all 35mm lenses. Also, some photos have been cropped, so the angle of view has changed. Nothing to worry about guys.
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Old 6 Days Ago   #1604
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Quote:
Originally Posted by teddy View Post
It's a typical rendition of all 35mm lenses. Also, some photos have been cropped, so the angle of view has changed. Nothing to worry about guys.
Huh, what exactly is a typical rendition of all 35mm lenses? Sharpness here doesn't simply fall off toward the corners. It comes back very near the extreme corner, before it falls off again. As I wrote before, of course it's nothing to be alarmed about, but unusual it is.
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Old 6 Days Ago   #1605
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Quote:
Originally Posted by retinax View Post
Huh, what exactly is a typical rendition of all 35mm lenses? Sharpness here doesn't simply fall off toward the corners. It comes back very near the extreme corner, before it falls off again. As I wrote before, of course it's nothing to be alarmed about, but unusual it is.
Yes, this sharpness eveness from centre to the extreme corner before falling off steeply is a good description of a typical 35mm lens angle of view. I'm not referring to all lenses, just the 35mm angle of view - typical curvature of field of a 35mm angle of view. Also, the image was cropped. It also helps to see the Curvature of Field performance realting to sharpness evident in the MTF charts provided in the last couple of pages of this thread.

About the "mushiness" on the right side before the extreme corners - this looks like camera spin from hand held shooting. The right side of the hand as the shutter is pressed lobs the image to the right from camera shake.

Sorry, I'm writting this before I head off to work - but there's nothing to worry about these details, although they can be unusual at first glance.
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Old 6 Days Ago   #1606
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Teddy, please read again what you replied to. The image in question does not display what you describe. And camera spin wouldn't leave an area near the corner unaffected.
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Old 6 Days Ago   #1607
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I wonder whatever happened to the 35mm external viewfinder?
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Old 6 Days Ago   #1608
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Kevin said that the finder could be ordered later on, I think.
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Old 6 Days Ago   #1609
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Xasthur, if i'm making the right assumption here, the Chinese New Year holiday was extended as a measure against the corona virus & has had an effect on the economy: https://www.cnbc.com/2020/02/08/coro...-holidays.html
I'm guessing the early photos of the viewfinder are prototypes and not production models.
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Old 6 Days Ago   #1610
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Quote:
Originally Posted by retinax View Post
Teddy, please read again what you replied to. The image in question does not display what you describe. And camera spin wouldn't leave an area near the corner unaffected.
Sure! I will have a read again.
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Old 5 Days Ago   #1611
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Quote:
Originally Posted by retinax View Post
Teddy, please read again what you replied to. The image in question does not display what you describe. And camera spin wouldn't leave an area near the corner unaffected.
Hello retinax, I stand my ground regarding what I said, ďThe typical 35mm, the constitution, and that's it, it's the vibe of it. I rest my case... ...

Just kidding... Yeah, nah - you're most positively right. I can see a strange unsharp blob on the top right side of the image which could be dicentrering - I don't know. Not typical at all. Well spotted.

Could Kevin please have a look at the image ending *****780 that Ed has taken and perhaps ask the maker on a possible explanation. Kevin must be very busy lately - hope you are well.
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Old 5 Days Ago   #1612
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Probably a good idea to do some formal testing on tripod..brick wall kind of stuff... pretty soon... with the first receivers..
To see about decentering etc..to make sure the QC is up to par..
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Old 5 Days Ago   #1613
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This is a very important issue for maintaining the high confidence in this lens and the replica project.

I hope that Kevin is paying attention to it.
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Old 5 Days Ago   #1614
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Wondering how this lens is reaching its customers...through RFF only? If not, rigorous testing would follow as a matter of course.
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Old 5 Days Ago   #1615
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I am not sure there is any issue here. Look at the wide open MTF. There is some kinda drop of sharpness in the middle frame area. That is part of the design and apparently also present in the original 8 elts. The picture that show this defect with the tree has been shot at f2.5 or so. So I think it can be just this... To be confirmed.
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Old 5 Days Ago   #1616
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Quote:
Originally Posted by vincentbihler View Post
I am not sure there is any issue here. Look at the wide open MTF. There is some kinda drop of sharpness in the middle frame area. That is part of the design and apparently also present in the original 8 elts. The picture that show this defect with the tree has been shot at f2.5 or so. So I think it can be just this... To be confirmed.

Yes, I've pointed this out in post 1597. People seem to want to disregard this... please, let's not panic.
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Old 5 Days Ago   #1617
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No panic here.
It seems to be a reasonable expectation to get feedback on this issue.
No panic
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Old 5 Days Ago   #1618
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On the other hand, it seems to be a rather dramatic transition from sharp to blur. An MTF graph does not typically 'drop off the cliff' in that manner. Even if it were to do so, it would be present in all photos at the same f/stop.
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Old 5 Days Ago   #1619
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Do images from the original V1 35/2 Cron show same issue?
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Old 5 Days Ago   #1620
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Well, just in time, here are 2 images from the original 8-element, again at f/8. While I do not see the issues raised with the prototype, I think the original lens is slightly less sharp.

Ed

L1003787 by woodswoman57, on Flickr

L1003786 by woodswoman57, on Flickr
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Old 3 Days Ago   #1621
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No panic... However we need to see brick wall tests from f2 to f11.
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Old 3 Days Ago   #1622
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Quote:
Originally Posted by teddy View Post
No panic... However we need to see brick wall tests from f2 to f11.
on the contrary...we need the lens to show up in our mailboxes
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Old 3 Days Ago   #1623
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Did you send payment?

The original may have less contrast, and the images may appear less sharp.
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Old 3 Days Ago   #1624
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Raid.... havent gotten an invoice yet & i'm sure i'm well down the list after you. I'm not getting worried about performance yet based on one digital image on my screen
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Old 3 Days Ago   #1625
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I am also not worried about the lens characteristics. I also have not received an invoice yet.
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Old 3 Days Ago   #1626
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The holiday was extended in China to the end of this month. Kevin once mentioned that parts are sourced throughout China. Unless they've stockpiled parts for the entire initial 500 lens run, there's likely to be further delays. Flights into and out of mainland China have been dramatically cut back.

Wouldn't hold your breath just yet waiting for FedEx.
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Old 3 Days Ago   #1627
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"Wouldn't hold your breath just yet waiting for FedEx." Great advice.....going to have to just make do with Leica glass
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Old 3 Days Ago   #1628
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Many flights to and from China have been canceled.
We will have to wait 1-2 additional months in my estimate.
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Old 3 Days Ago   #1629
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Quote:
Originally Posted by Deardorff38 View Post
"Wouldn't hold your breath just yet waiting for FedEx." Great advice.....going to have to just make do with Leica glass
Oh, the suffering!

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Old 3 Days Ago   #1630
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Remember that time when the outbreak of a virus postponed a new lens and everybody freaked out?
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Old 3 Days Ago   #1631
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Quote:
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Remember that time when the outbreak of a virus postponed a new lens and everybody freaked out?
A worthy meditation.
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Old 3 Days Ago   #1632
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Quote:
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Remember that time when the outbreak of a virus postponed a new lens and everybody freaked out?
.....but but... you just don't understand...it's the forum &....OCD collectors....

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Old 3 Days Ago   #1633
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I really wouldnt expect these lenses..anytime soon..
Too many factors at stake here..
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Old 2 Days Ago   #1634
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I saw this review about the 8 elements replica with some sample pictures but it is in chinese.

https://i50mm.com/gear%e5%99%a8%e6%9...8%bb%e7%89%88/
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Old 2 Days Ago   #1635
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Quote:
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I saw this review about the 8 elements replica with some sample pictures but it is in chinese.

https://i50mm.com/gear%e5%99%a8%e6%9...8%bb%e7%89%88/
Well, that means at least 1.5 billion people will be able to read it.
I don't think RFF has that kind of membership.
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Old 1 Day Ago   #1636
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Not yet, Huss, not yet! In 2000 years, things will be different.
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