I agree. Multicoating shouldn't have anything to do with chromatic
aberration. But I wouldn't expect this guy to know whether an old OM
50mm lens was really multicoated or not. Even we don't seem to be able
to say for sure. As you may recall some early OM lenses are multicoated
but not every element is multicoated and only some lenses advertise that
they're multicoated. But as to the lens test itself he probably doesn't
have to know very much about optics to be able to setup the test and run
the software. He should just refrain from speaking beyond his
knowledge. :-)
Chuck Norcutt
Dawid Loubser wrote:
> This following sentence (from the review) makes me seriously doubt
> that these guys know what they are doing. First of all, even though it
> is clearly
> a single coated lens (the F.Zuiko moniker tells us that) they state:
>
>> "Despite the fact that the lens is quite long in the tooth, its
>> multi-coating does
>> a good job of reducing chromatic aberration"
>
> Firstly, the lens in question does not have multi-coating (only the MS
> and MIJ versions
> have that, this is clearly a second generation single-coated example),
> and secondly,
> I was always under the impression that the optical formula of
> the lens is 100% responsible for correcting (or not) chromatic
> aberration and colour
> fringing. Coating merely improves light transmission, and decreases
> flare/haze caused
> by internal reflections. Not so?
>
> <rant>
>
> I always wonder about these tests - somebody happens to get their
> hands on an ancient
> OM optic, slap it on a digital body, and produce a "test". If people
> are so drawn to this,
> why not at least test the more interesting lenses? Use a 50/2.0 or
> 90/2.0 Macro, use
> a 21/2.0, or any of these amazing older lenses. Somehow, it's always
> the humble 50/1.8 "body cap"
> they got somewhere for free or for $10.
>
> </rant>
>
> Hope you all have a great week! I am picking up an Epson V700 scanner
> today - it's no Nikon 9000
> I know, but it should do just fine with my 6x7c, and 6x17cm slides,
> and as a huge side benefit, I
> can start scanning in some of my darkroom prints so you guys can see
> how much I suck with
> my OM-1! :-) Hopefully I can start to meaningfully contribute to TOPE
> etc now, as well as
> have images to post together with my often wild claims around OM optics.
>
> ...that is, if the Metro Police officers manning the roadblock which I
> sort-of forcefully skipped
> today to make the airport in time don't find me and lock me up first.
> It's pretty scary expecting
> them to come knocking on your door any moment, but in life, for every
> action there is a set of tradeoffs
> one makes, and I am afraid with this one they had the lowest priority.
> Of course, I don't expect many
> of you have experience with the police force of an African country. An
> equal amount of incompetence and
> ruthlessness / unreasonableness prevails. The South African traffic
> system (fines, registrations, etc)
> was really only computerised about 1 or 2 years ago, with huge
> teething troubles, so I am hoping that
> they will "forget" about me...
>
> *sigh*
>
> On 06 Jul 2009, at 8:11 PM, usher99@xxxxxxx wrote:
>
>> http://www.slrgear.com/reviews/showproduct.php/product/1279/cat/14
>>
>> This isn't the miJ is it?
>> Mike
>
>
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