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RE Auto Topcor 20mm f4
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PostPosted: Sat Apr 25, 2015 10:23 am    Post subject: RE Auto Topcor 20mm f4 Reply with quote

A few from this old rarity.Processing may be iffy as I`m working of an old laptop for the past few months due to house renovations and it`s not ideal, so minimal pp mostly.
First shot on a dull day

Some indoor museum type shots,highish iso.
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High contrast day- beach type.
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refelction in bottom right corner caused by lens hood/polariser.
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A couple of Topcor "blue sky" shots.
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Both shot with series 9 linear polariser. All on A7 mk 2.


PostPosted: Sat Apr 25, 2015 11:03 am    Post subject: Reply with quote

Well, they look nice on my screen - quite an uncommon lens.


PostPosted: Sat Apr 25, 2015 12:25 pm    Post subject: Reply with quote

That looks to do the job! Is it that rare a lens?


PostPosted: Sat Apr 25, 2015 1:27 pm    Post subject: Reply with quote

According to Antonetto and known existing serial numbers no more than 1800-2000 were ever made.


PostPosted: Sat Apr 25, 2015 3:48 pm    Post subject: Reply with quote

I have this lens and it perform pretty good on my 5N. It is good to see it perform pretty well on an A72 too.


PostPosted: Sat Apr 25, 2015 5:48 pm    Post subject: Reply with quote

Thanks for sharing.


PostPosted: Sat Apr 25, 2015 6:40 pm    Post subject: Reply with quote

Very nice.


PostPosted: Sun Apr 26, 2015 10:10 am    Post subject: Reply with quote

Thanks folks, these first ones were in more challenging conditions I guess and I`m still getting used to the A7mk2 and lens combo as it`s wider than I usually shoot! Here`s some more recent shots, it really is a fine little lens, not as soft in the corners as as I`ve read.

Topcor wides usually tolerate being stopped down to f13-16 without any great loss through diffraction, not a huge amount of distortion either so looking forward to using it more over the coming months.

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PostPosted: Mon Apr 27, 2015 2:56 am    Post subject: Reply with quote

nice samples.
I have this lens too. Many people said, it has better sharpness compared to Flektogon 20/4. I agree with it. specially wide open.


PostPosted: Mon Apr 27, 2015 1:54 pm    Post subject: Reply with quote

Thanks IAZA, nice to know.Strangely enough apart from the couple of days I`ve had out with it I haven`t really used it wide open or close up yet so will when I get the chance!


PostPosted: Sat Sep 19, 2015 6:59 pm    Post subject: Reply with quote

I recently found one of these little rare RE 4/20 mm beasts, together with the classical RE 1.8/5.8 cm and the RE 2.8/10 cm. Since i don't have an adapter yet, i didn't use it on the A7II. Together with the RE 1.4/5.8cm and the RE 3.5/135mm and two (slightly different) Topcon RE super SLRs they make a small but nice collection.

Which adapter do you use on the Sony A7II?

Stephan


PostPosted: Sat Sep 19, 2015 10:04 pm    Post subject: Reply with quote

I'm using a Big_is adapter, it's ok, my only nitpick is the release lever doesn't stick out very far, it's almost flush with the body of the lens, that may be a good thing depending on how you look at it.


PostPosted: Sun Jan 16, 2022 12:23 am    Post subject: Reply with quote

Here are a few images taken today here in my hometown Luzern (Lucerne in English). The light was peculiar - some very slight fog / mist, and very dim sunlight "shining" through the overcast. All pictures taken with Topcor RE 4/20mm and Sony A7II in "autumn mode" (to enhance colors, especially the yellows & reds).

PLEASE CLICK ON THE IMAGES TO GET ORIGINAL COLORS - FOR REASONS UNKNOWN TO ME SOME OF THE "THUMBNAILS" SHOWN BELOW HAVE PRETTY DULL COLORS ... !


Kasernenplatz in Lucerne, with the Science Museum on the left and the Historical Museum in the middle.
Topcor RE 4/20mm @ f11. JPG out of Sony A7II, "autumn mode".



Small venue near the Kasernenplatz, with parts of the building of the "Luzerner Staatsarchiv" (state archives) on the right.
Topcor RE 4/20mm @ f11. JPG out of Sony A7II, "autumn mode".



Display window of the "Alte Suidtersche Apotheke", the oldest pharmacy in Lucerne.
Topcor RE 4/20mm @ f11. JPG out of Sony A7II



Ancient houses near the Pilatusplatz. Some building in this street date back to the 15th century.
Topcor RE 4/20mm @ f4 (wide open). JPG out of Sony A7II, "autumn mode".



View from the Jesuitenkirche over the Reuss river. Large renaissance style building with tower on the left side is the Rathaus (city hall), built 1602-1606 partly in Italian style (facade) and partly in local style (roof). On the right side the Wasserturm ("water tower") which probably dates back to 1300.
Topcor RE 4/20mm @ f11. JPG out of Sony A7II, "autumn mode".



Back side of the main building of the "Luzerner Kantonalbank" (state bank of Lucerne), built around 1973.
Topcor RE 4/20mm @ f11. JPG out of Sony A7II, "autumn mode".



Detail of a zebra crossing and pavement just behind the "Kantonalbank".
Topcor RE 4/20mm @ f11. JPG out of Sony A7II, "autumn mode".



Ancient buildings adjacent to the Reuss river, partly dating back to the 16th century.
Topcor RE 4/20mm @ f11. JPG out of Sony A7II, "autumn mode".


Picture taken at the same location as above, but in the other direction: The Reuss river and the regulation system for adjusting its flow and for regulating the level of Lake Lucerne ("Vierwaldstättersee").
Topcor RE 4/20mm @ f11. JPG out of Sony A7II, "autumn mode".

S


PostPosted: Sun Jan 16, 2022 1:01 am    Post subject: Reply with quote

Compared to other well respected "slow" and small superides, the Topcor RE perfoms very well, especially at f11. I am pretty impressed by the lacking CAs and the very good corners. Actually this lens, at f11, might be nearly as good as the Loxia 21mm!

First the overview and the crop area (yellow):



Now the 100% crops from JPGs out of the 24 MP Sony A7II.
CLICK TWICE ON THE IMAGE TO GET FULL RESOLUTION!



I have tested also the Konica AR 4/21mm (with 77mm filter diameter certainly not a small lens), and it is not as good as the Topcor, but better than the Olympus.

Maybe that's useful for those who look for a smallish 20mm "landscape" lens with a very good performance at f8 or f11.

S


PostPosted: Sun Jan 16, 2022 3:06 am    Post subject: Reply with quote

These old top whores can really surprise you.


PostPosted: Sun Jan 16, 2022 10:25 am    Post subject: Reply with quote

Like 1 Like 1 Like 1 I have it, too


PostPosted: Mon Jan 17, 2022 7:11 am    Post subject: Reply with quote

cbass wrote:
These old top whores can really surprise you.

O_o