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Day Prime 2021 "Outtakes and Training"

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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2021 at 20:35
Andy, nice shots, great detail on the two macro's and the third is a nice tranquil scene.

31/03 is the right week for a 90 mm prime, so if you want I can move the post to the day prime thread instead of here in the training.

And indeed we didn't make a training thread for April Foolishness, these training threads were used so sparingly during the last couple of challenges that we didn't bother, probably a wrong decision
Pls. all vote for the April Foolishness exhibition here All members can vote!!!
 



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AsD View Drop Down
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Post Options Post Options   Quote AsD Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2021 at 21:13
Thanks, Pieter. I'll leave it in your hands as to where they reside.

As for the training thread, I have to admit that in my two previous challenges (Oktoberfest and Week 50 last year), I don't think I used them, so I can understand there not being one this time around.
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Snegren View Drop Down
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Post Options Post Options   Quote Snegren Quote  Post ReplyReply Direct Link To This Post Posted: 16 April 2021 at 18:57
Found a cheap 125 mm zoom end for day 125 that is actually of very good quality. Well, SMC Takumars generally are very good. Push-pull internal zoom, rotating front element.

Swing time

Camera Model: ILCE-7RM4
Lens: SMC Takumar-zoom 1:4/45-125
Focal length: 125 mm
Aperture: f/4
Exposure Time: 0.002 sec (1/640)
ISO: 100

Perhaps worth examining the 45 mm end as well, although 125/4 is reasonably fast and 45/4 is dead slow.

Edited by Snegren - 16 April 2021 at 19:50
“People demand freedom of speech as a compensation for the freedom of thought which they seldom use.” Søren Kierkegaard
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Fred_S View Drop Down
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Post Options Post Options   Quote Fred_S Quote  Post ReplyReply Direct Link To This Post Posted: 03 May 2021 at 20:20
I managed to get my Konishiroku Hexanon 47mm/f1.9 from Konica Auto-S working.
So here is an early training for Day 47 2022

As warned by Paul, it was a difficult surgery, which ended in a lens that only can be used wide open, but I don't see that as a huge problem, since I think the bokeh has potential


#1


#2


#3


#4


TFL
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Snegren View Drop Down
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Post Options Post Options   Quote Snegren Quote  Post ReplyReply Direct Link To This Post Posted: 03 May 2021 at 21:12
Yes, great potential Fred. Wide open very nice lens. When I still had a working aperture it proved superior sharpness at f/8. Alas, that was lost. I have a second copy to operate on, see if I can get the aperture to work.
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Post Options Post Options   Quote Fred_S Quote  Post ReplyReply Direct Link To This Post Posted: 04 May 2021 at 20:48
Good luck Paul! I haven't figured out yet how I would do it differently with a next copy
 



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Phil Wood View Drop Down
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Post Options Post Options   Quote Phil Wood Quote  Post ReplyReply Direct Link To This Post Posted: 04 May 2021 at 21:38
Originally posted by pegelli pegelli wrote:

And indeed we didn't make a training thread for April Foolishness, these training threads were used so sparingly during the last couple of challenges that we didn't bother, probably a wrong decision


They aren't heavily used, so you could just have one training thread for all challenges in the year eg 2021 Challenge Training.
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Snegren View Drop Down
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Post Options Post Options   Quote Snegren Quote  Post ReplyReply Direct Link To This Post Posted: 06 May 2021 at 11:37
This one came too late for day 110: Emil Busch A.-G. Rathenow Neokino 62.5/110 mm. It is a massive 62.5 mm diameter cinema projection lens. Rathenau, like Goerlitz, was a center of camera and lens industry. After the war Rathenau was in the DDR and the company became Rathenauer Optische Werke (ROW), was later merged into Pentacon and it went downhill after that. I was in Rathenau in the 1990s for work and the place was littered with derelict industrial buildings, all very sad. Anyway, I Frankensteined the lens onto a helicoid for now and ordered a more suitable adapter. As the adapter was not so cheap I though I should buy more 62.5 mm lenses (FL of 80 and 95). For now, the 110. Petzval lens, swirly when camera to subject and camera to background distance is adequately selected. Obviously it would be more swirly if the camera sensor would be bigger, this large diameter lens would be good for medium format cameras and would then reveal more of its optical flaws that we like to exploit:

110.1: Water three ways

Camera Model: ILCE-7M3
Lens: Emil Busch A.-G. Rathenow Neokino 62.5/110 mm
Aperture:
Exposure Time: 0.001 sec (1/800)
ISO: 100
“People demand freedom of speech as a compensation for the freedom of thought which they seldom use.” Søren Kierkegaard
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Snegren View Drop Down
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Post Options Post Options   Quote Snegren Quote  Post ReplyReply Direct Link To This Post Posted: 06 May 2021 at 20:08
A typical property of Petzval lenses is field curvature.... Makes you wonder how you can project film of a flat surface.

110.2: Shadow on the wall

Camera Model: ILCE-7M3
Lens: Emil Busch A.-G. Rathenow Neokino 62.5/110 mm
Aperture:
Exposure Time: 0.002 sec (1/500)
ISO: 100

Edited by Snegren - 06 May 2021 at 20:14
“People demand freedom of speech as a compensation for the freedom of thought which they seldom use.” Søren Kierkegaard
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