[LRflex] Re: Photokina and other disasters...
- From: keith.r.edwards@xxxxxxxxxxx
- To: leicareflex@xxxxxxxxxxxxx
- Date: Wed, 11 Oct 2006 15:47:52 +0100
Hi Javier,
Well regarding patents I'm fairly sure it will be 20 years if the owner m=
aintains
them - i.e. keeps paying the fees (I'm named as inventor on 15 granted US=
patents, for my sins, none helpful to this problem!!). the different time=
estimates comes from the issue of knowing how long it took from first fil=
ing
to grant. However, either way I suspect the patents won't have run out y=
et
- even if they have there is still the issue of doing the ASIC design wor=
k,
testing, etc., which I would guess will take a minimum 18 months from pro=
ject
start.
Regarding focus, I'm pleased to hear for you it is not an issue, however,=
I'm just not able to focus that reliably any longer due to an eyesight p=
roblem
(i.e. the 80 f1.4 wide open / one/ two stops down has become hit and miss=
).
I'm not saying there is any defect with the camera or MF 'on demand' conc=
ept
but for me focus confirmation (as far as I have tried it so far) looks li=
ke
it might be an answer for my circumstances. It also allows me to switch t=
o
digital on a budget of under =A3600 / ~US$1000 (400D body and 2 adaptors)=
.
Hence my earlier concern 'is the confirmation accurate' - a quick test su=
ggests
it is but I'll post my findings (if anyone is interested ;-)) after I've
tried it out in 'real' situations.
By the way, I think I recall reading (in AP?) Contax had to drop the focu=
s
confirmation because they ran out of chips (ICs) and the old design could=
n't
be put on a new process. But my memory on this is hazy to say the least!
Best regards
Keith
>-- Original Message --
>Date: Wed, 11 Oct 2006 06:26:10 -0700 (PDT)
>From: Javier Perez <summarex@xxxxxxxxx>
>Subject: [LRflex] Re: Photokina and other disasters...
>To: leicareflex@xxxxxxxxxxxxx
>Reply-to: leicareflex@xxxxxxxxxxxxx
>
>
>Hi
>I have heard 17 years for patents but I.m not sure
>because everybody seems to have a different figure. As
>for the focus confirm, I'm not so sure they would want
>to go with it. I have used the original AL-1 and an RX
>as well as the various EOSes on manual. What I've
>always found is that with a split image screen and
>diopter correction I can focus as well or better
>myself. I really don't think it's that much of a
>benefit except in very special situations. Perhaps
>that's why they got rid of it with the RX2. Whenever I
>use my RX I ignore the confirm altogether and don't
>have a problem with focusing. There really is no
>substitute for what I guess you might call focus on
>demand. I learned that when I got into EOSes and the
>N1.
>
>Javier
>
>--- keith.r.edwards@xxxxxxxxxxx wrote:
>
>> Hi Javier,
>>
>> Patents normally last 20 years (if they are still in
>> force), I wouldn't h=3D
>> old
>> your breath :-)
>> The Canon EOS / Leica Lens - autofocus confirm route
>> (yes I know the lens=3D
>>
>> is manual focus!) looks good 'stopgap' to me (most
>> of the benefits only r=3D
>> eal
>> downside is having to stop the lens down before
>> pressing the shutter). I
>> even think Leica might sell a few more lenses as a
>> result!
>>
>> Best regards
>> Keith
>>
>>
>> >-- Original Message --
>> >Date: Wed, 11 Oct 2006 04:40:52 -0700 (PDT)
>> >From: Javier Perez <summarex@xxxxxxxxx>
>> >Subject: [LRflex] Re: Photokina and other
>> disasters...
>> >To: leicareflex@xxxxxxxxxxxxx
>> >Reply-to: leicareflex@xxxxxxxxxxxxx
>> >
>> >
>> >Howdy
>> >Another thing I was thinking of. The AX came out I
>> >think around 96. That means it's patents were
>> probably
>> >applied for around 95 or 94 so they may only have 5
>> >years left in them. Now of course, Leitz can't wait
>> 5
>> >years to introduce an AF SLR but when patents start
>> >etting old, the owners are a lot more likely to
>> >license them so they can at least get some
>> additional
>> >income out of them. I wouldn't be surprised if
>> Leitz
>> >decided to go the AX route, at least as a stopgap
>> >until it can develop new generation of AF retro
>> >lenses.
>> >
>> >Javier
>> >
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>>
>>
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>
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