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jaapv

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Posts posted by jaapv

  1. In my experience the vast majority of "rangefinder inaccuracy" is user mistake (including myself). The most common undetected error is  looking through the viewfinder skewed and not in the optical axis. In fact, although the M10 rangefinder is the most precise and stable one ever built by Leica, the better eye relief makes this specific error easier to make.

  2. 15 hours ago, Artin said:

    This is interesting it corresponds with the earlier pictures we saw so no removable baseplate and a function button has moved from the face to the top 

    Which means it could double as a Video button by being programmable ;) 

  3. 2 minutes ago, MikeMyers said:

    Actually, while I used to like Presets, I have been talked out of using them.  My friends convinced me that it is ME who needs to make the choices and decisions regarding composition, color, saturation, and all the rest.  What I'm incapable of doing is correcting errors in my camera or lenses - that kind of a preset will gladly use.

    The nice thing with ON1 is that they provide a starting point of your choice, which you can tweak to refine it. Additionally you can use it as a full editor.

    (Composition is not a matter of presets ;) )

  4. Not planned obsolescence, but simply the pace at which technology it moving. In the past there were parts and simple machining can replace them - that is the way I keep my 53 year old summer car on the road - but it is impossible to expect complicated electronics made on machines costing hundreds of millions, to be manufactured forever in ever dwindling numbers

  5. 33 minutes ago, lct said:

    Good comment. Makes me remind that both 40mm lenses work fine with the 35/2 pre-asph lens profile on the digital CL but their FoV is 60mm on this APS-C camera due to the crop factor. I used to use my Summicron 40/2 a lot on the APS-C Epson R-D1 as it matched almost perfectly the later's 35mm frame lines at medium to long distance but i do prefer 35mm lenses on the digital CL. I would make sure that the OP's father feels comfortable with the 60mm FoV before ordering the lens. 

    It a should be fine if paired with 18

  6. 6 hours ago, J Peterman said:

    Thanks so much for your reply.  I think he would appreciate the more classic draw of the 40/f2.  I was leaning towards the version 2 (CLE) M-Rokkor (over the Leitz or CL V1) due to the better lens coatings.  
     

    If you don’t mind sharing, what are the differences between the Leitz and Minolta versions in terms of image quality?  I would imagine any differences would be slight given the mechanical and optical similarities, but I’ve read a bit about potentially more contrast with the V2 and better anti-flare characteristics?

    That is correct the coating is different. But you need eyes like a Vulture to see a significant difference. 

  7. 6 hours ago, IkarusJohn said:

    @adan is Andy Piper.

    This depth of field, f/stop/sensor size comes up every few years, and someone sensible like Andy clarifies it.  We almost need a pinned description.  All being equal, the f-stop of a lens is the ratio of its focal length to the diameter of the entrance pupil.  So, a 50/1.4 lens is still a 50/1.4 lens regardless of the size of the sensor it is attached to.

    If you attach a 50 Summilux-M f/1.4 to your CL, the only change will be that the field of view will be the same as a 75 Summilux-M on an M10.  The focal length of the lens doesn’t change, nor does the f number of the lens, or its “light gathering”, whatever that might mean.

    If you maintain the same angle of view (moving back with your CL camera to achieve the same image as with your M10), then you’re changing your perspective (as you’re moving the camera) and subject distance, increasing the depth of field.  Your CL will have greater depth of field than larger formats at the same f-number for the same distance of focus and same angle of view since a smaller format requires a shorter focal length (wider angle lens) to produce the same angle of view, and depth of field increases with shorter focal lengths.

    Talk of light gathering etc really is an unhelpful myth.  One lens, with one focal length and f-stop gathers the same light, regardless of the sensor size.  If the camera stays in the same place, with the same lens and same f-stop, the only thing which changes with a change in sensor is the angle of view.

    Edit - I am ignoring noise for this purpose.  As to EV, no it doesn’t change with format size - the amount of light hitting any photon is the same.  The total light hitting the sensor is less, purely because the sensor is smaller.  What confuses this discussion is that the CL and the M10 both have 24MP sensors, meaning that the photon sites on the CL are smaller.  That changes everything for image quality - but it has no impact on the lens focal length or f-stop.

    Actually the answer is quite simple. I wish people would have read at least a primer on optics. The term Light Gathering  depends on one thing only : The diameter of the lens   It is of no relevance for whatever receptor one hangs behind it.  But it is a nice catchy phrase to trip the unaware up.

     

     

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  8. Do you actually read posts like Andy’s ? In fact, the only thing that happens from APS to FF -everything else being equal- is that the noise floor is raised one EV level, reducing the photographic dynamic range by approx one EV stop. Given that for instance the CL has a PDR of about 13 EV values, (similar to negative film) this would only make any noise visible when the DR of the subject exceeds the PDR of the camera. 

  9. Andy has it completely right, as usual. Better listen to him than take notice of empty-headed Internet parroting.
    I see no significant difference between for instance the CL and the (approx same-generation) SL 601 - and what there is is a one-click removal with Topaz DeNoise AI. Noise is more a function of sensor design and firmware than anything else and will be a complete non-issue with the sensors that are in the pipeline.

    DOF with these modern lenses has no interest for me; often, when I get a really nice shot, I use Sharpen AI to crisp up the OOF areas or stack focus to get rid of the unsharpness - I am contemplating getting a Lomography Petzval 58 Bokeh Control lens for specific narrow-DOF use - it would run rings around any of the stuff discussed here and make the whole discussion moot.

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