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Archive 2009 · The APO thread
  
 
Anden
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p.9 #1 · The APO thread


Jonas B wrote:
foxbat wrote:
burningheart wrote:
Coastal Optics
[...]


The fabled Coastal 60 makes an appearance! Would love to see more of this little legend.


Oh no. No more of those!


+1 and +1!

Nov 09, 2009 at 02:14 PM
burningheart
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p.9 #2 · The APO thread


Anden wrote:
Jonas B wrote:
foxbat wrote:
burningheart wrote:
Coastal Optics
[...]


The fabled Coastal 60 makes an appearance! Would love to see more of this little legend.


Oh no. No more of those!


+1 and +1!




But you do know its a UV and IR specialized lens and those pictures can be quite color spectrum deficient.

In time there will llikely be more, but tis the season that beautiful colors has ended, not much except, browns, greys, evergreen green and so far no white yet. Maybe once the new conservancy at the zoo is open to the public I can get shooting it again. or when I head to Yellowstone this winter, assuming the cold doesn't ice up the lens barrel.

Nov 09, 2009 at 03:50 PM
thrice
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p.9 #3 · The APO thread


How about a wide open Voigtlander 180mm APO lanthar shot



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Not the best example of this lens' wonderful bokeh.



Nov 09, 2009 at 04:16 PM
helimat
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p.9 #4 · The APO thread


How about a CV 125/2.5 montage?



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I am on my laptop, so I apologize if the colours are off.

Nov 10, 2009 at 06:03 PM
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p.9 #5 · The APO thread


Very nice, Mat.

There's no foot in that shoe, is there?

Nov 10, 2009 at 06:16 PM
helimat
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p.9 #6 · The APO thread


cogitech wrote:
Very nice, Mat.

There's no foot in that shoe, is there?


Thanks Paul...
No we checked. It is actually more common to find a shoe with a foot than without out here these days.

Nov 10, 2009 at 06:51 PM
cogitech
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p.9 #7 · The APO thread


Yes, I've heard all about that ongoing mystery. Sick sh!t.

Nov 10, 2009 at 06:57 PM
freaklikeme
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p.9 #8 · The APO thread


Nice montage, Matt. A great lens put to great use.

Now I must go Google Canadian bodiless feet.

Okay, that is creepy.

Nov 11, 2009 at 04:33 AM
helimat
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p.9 #9 · The APO thread


Yes it is creepy. The police are acting like there is nothing sinister going on, and that there is a perfectly good explanation for why seven feet in shoes have washed up in the Georgia Strait. I wasn't too worried about finding a foot in this shoe, as I found it on the West Coast of the Island, but checked nonetheless.

EDIT- Now eight feet. I guess they found another one a couple of weeks ago.

Nov 11, 2009 at 04:22 PM
cogitech
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p.9 #10 · The APO thread


The theory is that the feet are from bodies dumped after mob/gang killings. As the bodies decompose, the feet come loose and then float to the surface due to the buoyancy of the sneakers.

Or just some sick serial killer. Who knows? Maybe pigs don't like feet?

Nov 11, 2009 at 09:10 PM
sirimiri
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p.9 #11 · The APO thread


I admire your manual focus ability - do you have a microprism or split-screen? I try shooting a 200mm wide open on the 40D and often fail :-( Not that the 40D has large, bright finder anyway...
thrice wrote:
How about a wide open Voigtlander 180mm APO lanthar shot



Nov 11, 2009 at 09:20 PM
philber
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p.9 #12 · The APO thread


sirimiri wrote:
I admire your manual focus ability - do you have a microprism or split-screen? I try shooting a 200mm wide open on the 40D and often fail :-( Not that the 40D has large, bright finder anyway...




I try to shoot a Contax 180mm stopped down on a 5D MKII with a Eg-s focuing screen and mostly fail. So I am not about to start throwing stones here...

Nov 11, 2009 at 10:19 PM
PSquared63
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p.9 #13 · The APO thread


Leica APO-Telyt 800/5.6



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Nov 11, 2009 at 11:06 PM
 



philber
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p.9 #14 · The APO thread


Breathtaking, what can I say... congratulations

Nov 11, 2009 at 11:21 PM
RustyBug
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p.9 #15 · The APO thread


PSquared63 ... that's not even funny, totally cruel ... showing me a Leica APO 800 5.6 ... pure torture.

I couldn't even dream a lens like that ... let alone ever conceive shooting with one.

Nov 12, 2009 at 04:40 AM
phuang3
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p.9 #16 · The APO thread


Wow.. 800/5.6! It will be very difficult to handle this lens while sooting in low light.

Nov 12, 2009 at 04:56 AM
PSquared63
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p.9 #17 · The APO thread


Thanks guys.

phuang3 wrote:
Wow.. 800/5.6! It will be very difficult to handle this lens while sooting in low light.


Yes, it is, But, I don't give up easily. BTW, the white streaks in the background are bugs flying around.






  R9 - Digital Back DMR    800 mm    f/5.6    1/30 sec    800 ISO    0.0 EV  



Nov 12, 2009 at 07:07 AM
PSquared63
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p.9 #18 · The APO thread


Leica APO 180/2 torture test. School play outdoors, in the shade, with the bright sun in the background.








Nov 12, 2009 at 07:17 AM
tsdevine
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p.9 #19 · The APO thread



Picked up a CV 125mm Lanthar and was just doing some test shots. Here's one that caught my eye.

Shot @ f/2.5

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Nov 12, 2009 at 01:37 PM
Paul Yi
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p.9 #20 · The APO thread


CV 90/3.5....
I think this is one of the sharpest lens for the money.




























Nov 12, 2009 at 10:50 PM
burningheart
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p.9 #21 · The APO thread


Voigtlander 125 @ f2.5



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100% crop



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Dec 30, 2009 at 06:33 AM
AlexTokyo
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p.9 #22 · The APO thread


Technically, a mirror lens is APO

So, I hope it's OK to intrude a bit w/ a converted FD 500/8 ... taken today from my rooftop in Tokyo:


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Another one from this great lens


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And I cannot resist ... one more


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It's not that I care for the weird bokeh, but this lens is fun to play with and manual focus is sooo smoooth. Glad I have LiveView though.

Jan 09, 2010 at 03:30 PM
freaklikeme
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p.9 #23 · The APO thread


Paul Yi wrote:
CV 90/3.5....
I think this is one of the sharpest lens for the money.


+1. I'm not a fan of the bokeh (this is where I think the CV 180 has it over it's shorter APO siblings) but I am a fan of everything else this lens does.

Jan 09, 2010 at 06:32 PM
freaklikeme
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p.9 #24 · The APO thread


AlexTokyo wrote:
Technically, a mirror lens is APO
It's not that I care for the weird bokeh, but this lens is fun to play with and manual focus is sooo smoooth. Glad I have LiveView though.


Those are beautiful, Alex. What is it about the mirror design that makes it technically APO?

Jan 09, 2010 at 06:34 PM
Edward Gill
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p.9 #25 · The APO thread


Those are beautiful, Alex. What is it about the mirror design that makes it technically APO?

Brad

Mirror lenses, as long as they have no lenses elements - just mirrors, do not refract light and therefore do not creat chromatic error (different colors of light focused at different points). APO lenses are corrected for three wavelengths (colors) of the light spectrum (generally red, green, and blue). Meaning that these three colors will be brought to focus at the same point. Lens designers use glass with differing refractive indicies to bend the light (remember the sciince experiments in school using a prism to split white light into the different components of color?). This is where all those terms like UD, LD, AD, ED come from describing, the types of glass used in the optical design. Wikapedia has a pretty do explanation here: http://en.wikipedia.org/wiki/Apochromat


Back to your question: As long as a mirror lens uses no lenses they do not refract the light and introduce color error (chromatic abberation). Actually most photography mirror optics do include refractive lenses elements to correct other optical problems in the overall design and can actually have chromatic aberations. Its just easier for the optical designers to keep the chromatic errors small and unnoticable because the lenses in mirror optics do not need to do a lot of light bending and can also use expensive glass since they are small.

Sorry for the long winded answer, but optical terms are often poorly understood and erroniously used by folks that should know better like on popular lens testing site that equates chromatic aberations to anti-reflective lens coatings rather than the true source which is the designers choice of glass and the optical formulation to correct aberations.

Ed

Jan 09, 2010 at 07:18 PM




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