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raydeng
Guest
What do you mean by mustache, Vivek?
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I cant wait, thanks.Wiregen...that looks like the navitar variant... I'll take sum pics of mine...with instructions for modification* to fit. Is your camera a G1/Gh1 or a GF1.
* I assume no responsibility if you damage your own lens after reading this post
What viveck means is this lens distorts like spherical wise. (almost like fisheye but not so much)
Mustache distortion? No clue. lol
"Mustache" distortion is what you get when a lens distort the image to different degrees over the image circle. In practise you can see it as a wavy horizon. This isn't very unusual and also some highly regarded WA lenses suffer from this, like the Zeiss C/Y 21/2.8 or the Olympus OM 20/2. It can be corrected in software.
/Jonas
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Vivek
Guest
Simple barrel distortion- looks obvious but easy to correct.
Mustache (wavy) distortion- does not look that obvious and difficult (if not impossible) to correct.
Mustache (wavy) distortion- does not look that obvious and difficult (if not impossible) to correct.
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raydeng
Guest
Hm, I seem to have this lens as well. And I thought it was a Senko too!
I'm wondering if it's a true 0.95 though. Barring the possibility of dust, I did a simple test of shooting the same scene with this lens and my Pentax/Cosmicar 25mm 1.4.
The Pentax shot the scene at 1/20th of a second. The Senko (at 0.95) shot it at 1/30th. And there was a massive white balance difference (the Pentax/Comiscar was a lot warmer), as well as a ton of barrel distortion from the Senko.
If the math holds true, that's only half a stop. It should be *over* a stop, yes?
I'm wondering if it's a true 0.95 though. Barring the possibility of dust, I did a simple test of shooting the same scene with this lens and my Pentax/Cosmicar 25mm 1.4.
The Pentax shot the scene at 1/20th of a second. The Senko (at 0.95) shot it at 1/30th. And there was a massive white balance difference (the Pentax/Comiscar was a lot warmer), as well as a ton of barrel distortion from the Senko.
If the math holds true, that's only half a stop. It should be *over* a stop, yes?
Y.B.Hudson III
New member
raydeng... what metering mode was your camera in? Because of the vignetting you need to use the spot meter if you are comparing readings.
my quick test, spot metering mode... conpewtar 1.3= 100; modified nav 0.95=200
................. center weighted mode... conpewtar 1.3= 100; modified nav 0.95=160
I rest my case...
my quick test, spot metering mode... conpewtar 1.3= 100; modified nav 0.95=200
................. center weighted mode... conpewtar 1.3= 100; modified nav 0.95=160
I rest my case...
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Vivek
Guest
Spot on! Literally!
Y.B.Hudson III
New member
nav 0.95 modified to fit RJ adapter...
I will post how to pics tonite. File down the focus ring, and remove the rear element retainer ring, then cement rear element in place.
Hudson :thumbs:
I will post how to pics tonite. File down the focus ring, and remove the rear element retainer ring, then cement rear element in place.
Hudson :thumbs:
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I modified mine. Mine doesn't seem to go to infinity. But I can focus close to infinity.
I like how the lens draws bokeh, I say it's almost like a noctilux.
Senko 50 .95 "pop art" filter on the ep-2
Leica M8 with Noctilux DNG converted
Same "pop art filter" e-p2 with senko lens
I like how the lens draws bokeh, I say it's almost like a noctilux.
Senko 50 .95 "pop art" filter on the ep-2
Leica M8 with Noctilux DNG converted
Same "pop art filter" e-p2 with senko lens
Y.B.Hudson III
New member
Yehh... I prefer the flowery bokeh of t' Switar macro 26mm 1.1
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Vivek
Guest
wiregan, That is not a Senko but a Navitar. Mine came with the original cardboard box and the numbers correspond to Navitar's numbers.
Y.B.Hudson III
New member
yehh...zcream, what camera do you plan on using?
Pat Donnelly
New member
This gentleman is reputable, I have dealt, and has a large supply, sold 5+ so far, none to me, of the Navitar version. He resides in the USA.
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=270592985183&ssPageName=STRK:MEBIDX:IT
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=270592985183&ssPageName=STRK:MEBIDX:IT
paparazzi666
New member
hi zcream, i saw your tutorial on sanding down the focus ring of the 25mm navitar. its quite useful. but you mentioned it did not reach infinity focus. how far will it focus? if it reaches close to infinity then it might work for portrait use which is what I am looking for. Did you modify the 50mm as well? does that reach infinity?