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pdccameras
Joined: 23 Aug 2009
Posts: 826
Location: Putnam, CT
Expire: 2014-08-11
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 Posted: Wed Aug 17, 2011 3:18 am Post subject: Laack Anastigmat Definon 75mm f/4.5 |
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pdccameras wrote:
Here is a cute little enlarging or process lens I tested this afternoon on the NEX (This is part of a group of lenses I am consigning to Ebay in order to refund). The lens is a Laack Anastigmat Definon 75mm f/4.5. I know Laack is short for lackluster, but it doesn't seem bad at all! I messed around with this one way back when I had a Nikon D100, and then forgot about it. I have no idea where it came from, except that I had a bunch of them at one time. The NEX motivated me to make a few images before saying goodbye. Shown is the lens mounted on the NEX, a shot at f/8, and then some wide open shots to show off the lens' close focus and bokeh performance. Quite respectable!
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Canon 5D Mii, Canon 40D, Canon 350D IR, Sony A7 Mii, Sony Alpha-6000, a ton of lenses: AF & MF and too many cameras to count, all formats: 110 - 4x5. |
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15685
Expire: 2014-01-07
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| Posted: Wed Aug 17, 2011 3:24 am Post subject: |
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iangreenhalgh1 wrote:
Not bad for what it is, I have a Tessar 3.5/75 EL of similar vintage and that is sharp like all Tessars but has very poor contrast, being uncoated.
How is it mounted? M42-NEX adapter then an M42 helicoid and a step-up ring on the lens?
Where did you get the helicoid and how much was it?
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I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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pdccameras
Joined: 23 Aug 2009
Posts: 826
Location: Putnam, CT
Expire: 2014-08-11
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| Posted: Wed Aug 17, 2011 3:32 am Post subject: |
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pdccameras wrote:
| iangreenhalgh1 wrote: |
Not bad for what it is, I have a Tessar 3.5/75 EL of similar vintage and that is sharp like all Tessars but has very poor contrast, being uncoated.
How is it mounted? M42-NEX adapter then an M42 step-up ring? |
I just posted the Tessar 75 f/4.5 and I agree completely - much lower contrast.
This lens is mounted in a standard SK Componon -> LTM M39 ring, secured on the back with the lens' flange. I then put an M39 -> M42 ring on and screwed the whole thing into an M42 helical focus tube fitted with an M42-> EOS adapter ring. The M42 focus tube is then mounted to the NEX via an EOS->NEX adapter. I have a bunch of EOS adapters, so it was more economical for me to get the EOS-> NEX adapter and stack the rings. More complicated, but less expensive!
P.
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Canon 5D Mii, Canon 40D, Canon 350D IR, Sony A7 Mii, Sony Alpha-6000, a ton of lenses: AF & MF and too many cameras to count, all formats: 110 - 4x5. |
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exaklaus
Joined: 11 Aug 2009
Posts: 1633
Location: Niederrhein, Germany
Expire: 2011-12-02
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| Posted: Wed Aug 17, 2011 7:23 am Post subject: |
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exaklaus wrote:
Nice find!
here are a few information from a Laack-catalogue from 1939.
Klaus
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my Ebay auctions
Canon 5D II,
Fuji GW690III, Fuji G617, Fujifilm X-E1
Bessaflex TM
Tachihara 4"x5"
Summilux-R 1:1,4/50
Canon FD 85mm 1:1,2
Color-Heliar 75mm F2.5 SL
www.autoselbstfotografie.de
www.classic-cameras-and-lenses.de |
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pdccameras
Joined: 23 Aug 2009
Posts: 826
Location: Putnam, CT
Expire: 2014-08-11
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| Posted: Thu Aug 18, 2011 1:55 pm Post subject: |
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pdccameras wrote:
HI Klaus,
Thanks for the great info!!! My German is pretty bad, am I to understand from this ad that this lens was an "affordable" option for amateurs? Also that it is a triplet (dreilinsiger)? It seems the example I have is # 1118: 7.5 cm f/4.5, covering 45 x 60 cm. I am not familiar with this format, but it seems to be roughly double 35mm - possibly 127? Also, are these described as taking lenses for still photography, or are they enlarging lenses?
Best,
Paul
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Canon 5D Mii, Canon 40D, Canon 350D IR, Sony A7 Mii, Sony Alpha-6000, a ton of lenses: AF & MF and too many cameras to count, all formats: 110 - 4x5. |
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exaklaus
Joined: 11 Aug 2009
Posts: 1633
Location: Niederrhein, Germany
Expire: 2011-12-02
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| Posted: Thu Aug 18, 2011 1:59 pm Post subject: |
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exaklaus wrote:
Hi Paul, yes, it is a "for amateurs affordable" enlarging lens. yes, for 127er format.
Have a nice day
Klaus
_________________
my Ebay auctions
Canon 5D II,
Fuji GW690III, Fuji G617, Fujifilm X-E1
Bessaflex TM
Tachihara 4"x5"
Summilux-R 1:1,4/50
Canon FD 85mm 1:1,2
Color-Heliar 75mm F2.5 SL
www.autoselbstfotografie.de
www.classic-cameras-and-lenses.de |
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pdccameras
Joined: 23 Aug 2009
Posts: 826
Location: Putnam, CT
Expire: 2014-08-11
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| Posted: Thu Aug 18, 2011 3:01 pm Post subject: |
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pdccameras wrote:
Thanks, Klaus!
Paul
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15685
Expire: 2014-01-07
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| Posted: Thu Aug 18, 2011 5:02 pm Post subject: |
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iangreenhalgh1 wrote:
Hiya Paul
I was looking again at your shots and I see very good sharpness in the infinity one, the telegraph lines are rendered in detail.
The conker shot looks soft, but I think you've backfocused and that's why, some of the spikes look very sharp, so you only missed it by a cm or so.
If the conker was in proper focus it might rival the tessar you have for sharpness?
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I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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pdccameras
Joined: 23 Aug 2009
Posts: 826
Location: Putnam, CT
Expire: 2014-08-11
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| Posted: Thu Aug 18, 2011 7:55 pm Post subject: |
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pdccameras wrote:
| iangreenhalgh1 wrote: |
Hiya Paul
I was looking again at your shots and I see very good sharpness in the infinity one, the telegraph lines are rendered in detail.
The conker shot looks soft, but I think you've backfocused and that's why, some of the spikes look very sharp, so you only missed it by a cm or so.
If the conker was in proper focus it might rival the tessar you have for sharpness? |
Absolutely... I am pretty sure it was user error! If I have a moment, I will reshoot something closeup!
Paul
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Canon 5D Mii, Canon 40D, Canon 350D IR, Sony A7 Mii, Sony Alpha-6000, a ton of lenses: AF & MF and too many cameras to count, all formats: 110 - 4x5. |
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