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Mir Lenses - what are the exact differences & advantages
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PostPosted: Wed Mar 18, 2009 6:49 am    Post subject: Reply with quote
Do you think there will be any problems focusing to infinity after putting an adapter on either the M-24H or M version? I have a Canon EOS 450D Thanks!


PostPosted: Wed Mar 18, 2009 9:28 am    Post subject: Reply with quote
Zoom wrote:
wariag wrote:

Results of resolution test of Soviet lenses are provided in lines/mm.

Yes.

wariag wrote:

So it would be about 22/11 (Mir-1) and 20/10 lp/mm (Mir24M).

Nope. Sorry, you are wrong.

Russian l/mm is equal to the Western (btw: from the world of TV-technics) lp/mm.
Why? Because a white (or black) line must be on the black (or white) background...
See also (in Russian, from the same source):
[ur=http://www.luminous-landscape.com/tutorials/understanding-series/understanding-mtf.shtmll=http://www.zenitcamera.com/qa/qa-resolution.html#n1]www.zenitcamera.com/qa/qa-resolution.html#n1[/url]


OK, I am wrong, so the others are Smile

"Resolution is usually measured in lines per millimeter, or line pairs per millimeter. (L/mm and LP/mm). Be careful not to confuse the two. These are not the same. Typically engineering types refer to lines per millimeter, rightly assuming that to have a black line one must also have a white line. But, photographers tend to be less rigorous in their thinking and so line pairs per millimeter is commonly used. Just be aware of what is being discussed, but also be aware that numerically L/mm is double LP/mm. 50 L/mm to an engineer means 50 line pairs, because as discussed above every black line must have matching white line. This is similar to the confusion that exists between DPI (dots per inch) and PPI (pixels per inch). Different, to be sure, but similar enough in common usage so you need to know what each is actually referring to."
http://www.luminous-landscape.com/tutorials/understanding-series/understanding-mtf.shtml


PostPosted: Wed Mar 18, 2009 9:34 am    Post subject: Reply with quote
winmazing wrote:
Do you think there will be any problems focusing to infinity after putting an adapter on either the M-24H or M version? I have a Canon EOS 450D Thanks!


There shouldn't be but I'm not a Canon user. I'm sure there must be a Canon user on this forum who has used the Mir 24. Lets hope he sees your post. If not start a new thread asking for specific advice.


PostPosted: Wed Mar 18, 2009 10:07 am    Post subject: Reply with quote
I ended up getting the MIR-24H for $70USD because of its closer focal length and greater aperture range. Hopefully it won't disappoint. Now to get an adapter


PostPosted: Wed Mar 18, 2009 10:50 am    Post subject: Reply with quote
sichko wrote:
winmazing wrote:
Do you think there will be any problems focusing to infinity after putting an adapter on either the M-24H or M version? I have a Canon EOS 450D Thanks!


There shouldn't be but I'm not a Canon user. I'm sure there must be a Canon user on this forum who has used the Mir 24. Lets hope he sees your post. If not start a new thread asking for specific advice.


Absolutely no problem at all:

On EOS 50D:



On EOS 400D:


PostPosted: Wed Mar 18, 2009 12:52 pm    Post subject: Reply with quote
Hi, Orio.
Have all the MIR's this warm tonality?


PostPosted: Wed Mar 18, 2009 1:00 pm    Post subject: Reply with quote
estudleon wrote:
Hi, Orio.
Have all the MIR's this warm tonality?


The second photo was taken under tungsten light, so that explains it.
The first photo does not seem to have a warm cast to me.


PostPosted: Wed Mar 18, 2009 1:53 pm    Post subject: Reply with quote
Orio wrote:
estudleon wrote:
Hi, Orio.
Have all the MIR's this warm tonality?


The second photo was taken under tungsten light, so that explains it.
The first photo does not seem to have a warm cast to me.



Yes, it's subjetive, but I note the pavement like too reddish, something unreal, that I do not identify with which I see normally in rainy days. But you are right, it´s subjetive.


PostPosted: Wed Mar 18, 2009 1:59 pm    Post subject: Reply with quote
estudleon wrote:

Yes, it's subjetive, but I note the pavement like too reddish, something unreal, that I do not identify with which I see normally in rainy days. But you are right, it´s subjetive.


That was the lighting that day. In fact, the light was the reason why I took the photo. It is not uncommon lighting here especially when the wind blows from the south. Sometimes it carries so much sand that the day after I find a layer of red sand on the car. When I took the photo, the rain was already finished.


PostPosted: Wed Mar 18, 2009 3:16 pm    Post subject: Reply with quote
Quote:

Resolution is usually measured in lines per millimeter, or line pairs per millimeter. (L/mm and LP/mm). Be careful not to confuse the two.

For me is not clearly to think out these lp/mm. It was not necessary to pull it from a TV-technics. Now all are confused...


PostPosted: Wed Mar 18, 2009 3:45 pm    Post subject: Reply with quote
I think the figures show that the MIR-24 is slightly more resolving than the MIR-1
No revolutionary difference.
Of course resolvance alone does not tell everything about a lens and so here's where the better coating on the MIR-24 comes into play. By improving (significantly) the contrast of the lens and by increasing the colour density, the coating plays an important part in making the MIR-24 a more pleasing lens to use (at least for me).


PostPosted: Wed Mar 18, 2009 5:05 pm    Post subject: Reply with quote
winmazing wrote:
I ended up getting the MIR-24H for $70USD because of its closer focal length and greater aperture range. Hopefully it won't disappoint. Now to get an adapter


You list Nikon Micro-Nikkor 55mm f/3.5 already, so the Mir 24-N which is also a Nikon mount would use the same adapter for your Canon, no?

Last edited by ChrisLilley on Wed Apr 01, 2009 2:30 pm; edited 1 time in total


PostPosted: Wed Mar 18, 2009 5:44 pm    Post subject: Reply with quote
Orio wrote:
I think the figures show that the MIR-24 is slightly more resolving than the MIR-1


Do you have the figures for the Mir 24H ? Those for the Mir 24M show that it has less resolving power than the Mir 1.


PostPosted: Wed Mar 18, 2009 6:31 pm    Post subject: Reply with quote
sichko wrote:
Those for the Mir 24M show that it has less resolving power than the Mir 1.


Really?


PostPosted: Wed Mar 18, 2009 7:01 pm    Post subject: Reply with quote
Orio wrote:
sichko wrote:
Those for the Mir 24M show that it has less resolving power than the Mir 1.


Really?


The figures are quoted in an earlier post in this thread.


PostPosted: Thu Mar 19, 2009 2:02 am    Post subject: Reply with quote
sichko wrote:

The figures are quoted in an earlier post in this thread.


Ah ok, I saw them now. Yes, small difference in favour of the MIR-1


PostPosted: Thu Mar 19, 2009 6:26 am    Post subject: Reply with quote
I have the silver M39 Silver Grand Prix Brussel 1958 MIR-1. I like this lens alot. It enables me to take good photos and also the "glow" I like.


PostPosted: Fri Mar 20, 2009 1:05 am    Post subject: Reply with quote
kansalliskala wrote:
rawhead wrote:

What you do is you pre-set the aperture to what you want to shoot with... say f5.6. Most presets will let you move between wide open and that number f5.6.

So, after you preset the aperture, go wide open, focus, then stop down to f5.6, meter, and shoot.


Or the alternative way: preset the aperture - forget to stop down - and curse like *$£@l when the slides come back over-exposed. Shocked Evil or Very Mad

And what kind of klutz would do that for a wedding shoot? Don't ask me how I know, I just do, ok?


PostPosted: Sat Mar 21, 2009 1:15 am    Post subject: Reply with quote
Orio wrote:
sichko wrote:

The figures are quoted in an earlier post in this thread.


Ah ok, I saw them now. Yes, small difference in favour of the MIR-1


Note that in Russia lens' performance was mesaured wide open. Therefore it's not surprising for Mir-1 to be sharper wide open at f/3.5 than Mr-24 at f/2. Try stopping down Mir-24 and you'll see its resolving power.


PostPosted: Wed Apr 01, 2009 4:02 am    Post subject: Reply with quote
So after a couple of weeks i finally received my Mir-24 and boy was I in for a surprise.

I haven't taken any pictures with it yet because i haven't gotten my Nikon to Eos mount yet, but I don't think i would've in the condition i got the lens in. There was a cloud of dust inside the lens - not a spec or two, but a visible cloud of small dust. It was one of those boring days so i decided to take the lens apart to clean it out.

It was actually surprisingly easy. It was obvious someone had opened it up before as the screws were a bit worn. I opened the front of the lens by unscrewing the donut ring that secures the lens elements in and guess what i found under the ring - a worm! Shocked looked like a small silk worm or larvae of some sort. Must've been there for over a decade

Well after that I took the elements out above and under the aperture rings - cleaned the dust out with the help of some microfiber cloths and a hurricane blower. Put everything back and took it apart again to clean the aperture rings and now the lens seems to be in a respectable condition.

I realized one important thing while dissembling the lens - I normally have my MF lenses set on its highest aperture/lowest f stop number, but that actually stretches the spring that controls the aperture openings,. Over time the spring will get elongated and less snappy so now i have all my MF lenses set to infinity. I'm sure many of you know of this, but I thought i'd share my experience.

Looking forward to take some pics!
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