[LRflex] Re: Moon
- From: "Marc Dufour" <foto@xxxxxxxxxxxxxx>
- To: <leicareflex@xxxxxxxxxxxxx>
- Date: Mon, 20 Jun 2011 08:13:06 +0200
Thanks Philippe ! For your both explanation and appreciation.
I'll try to get more information before 2018, year of the next lunar eclipse
:-)
Amitiés depuis un Castellón nuageux
Marc
-----Mensaje original-----
De: leicareflex-bounce@xxxxxxxxxxxxx
[mailto:leicareflex-bounce@xxxxxxxxxxxxx] En nombre de philippe.amard
Enviado el: domingo, 19 de junio de 2011 23:55
Para: leicareflex@xxxxxxxxxxxxx
Asunto: [LRflex] Re: Moon
Le 19 juin 11 à 21:46, Marc Dufour a écrit :
>
> Hi David !
>
>
> It's one of these cases I miss a little scientific knowledge.
> Another task for another life... :-)
>
> I observed a strange thing while I was taking the pictures,
> something maybe you can explain:
>
> In the last photos, with a generous portion of bright light, when
> trying to get an accurate focus, I observed a very thin green stripe
> in the left limit of the moon, changing to red with just a slight
> movement of the focus ring (and really difficult to avoid). Could it
> be just a matter of lens cleanliness ?
>
Chromatic abheration is my take, but I'm no expert
LR and other programmes can change this, within certain limits from my
experience.
A very brilliant idea you've had in any case, and a wonderful result
Amitiés
Ph
> Thanks in advance, and once again for your so kind comments,
>
> Marc
>
>
>
> -----Mensaje original-----
> De: leicareflex-bounce@xxxxxxxxxxxxx
[mailto:leicareflex-bounce@xxxxxxxxxxxxx
> ] En nombre de David Young
> Enviado el: domingo, 19 de junio de 2011 17:29
> Para: Marc Dufour
> Asunto: [LRflex] Re: Moon
>
>
>
> In a message dated 19/06/2011, Marc Dufour said ...
>
>
>
>> PS is the responsible, David ;-)
>
>> I took the first picture about PM 10:30, and the last one, around
>> 11:15.
>
>> All taken using tripod and a Leica Vario-Elmar 70-210.
>
>> I tried different exposures and ISO, from 100 to 2000 ASA.
>
>> ... Too much move with long exposure (about 3'') and too much noise
>> with high
>
>> ASA.
>
>
>
> Hi Marc!
>
>
>
> One of the most common mistakes in lunar/solar photography is that we
>
> forget the motion of the earth! Exposures over a certain length
>
> (determined by the focal length used) become blurred by the earth's
>
> rotation.
>
>
>
> I haven't photographed a solar eclipse since 1994, and thus I've
> forgotten
>
> the formula, but it is a serious matter.
>
>
>
> Your "finished product" looks great!
>
>
>
> Cheers!
>
>
>
>
>
> --
>
> David Young - Photographer
>
> Logan Lake, CANADA
>
>
>
> Wildlife: www.furnfeather.net
>
> Personal: www.main.furnfeather.net
>
> A micro-lender through www.Kiva.org.
>
>
>
>
>
>
>
>
>
>
>
> ------
>
> Unsubscribe or change to/from Digest Mode at:
>
> http://www.lrflex.furnfeather.net/
>
> Archives are at:
>
> //www.freelists.org/archives/leicareflex/
>
>
> ------
> Unsubscribe or change to/from Digest Mode at:
> http://www.lrflex.furnfeather.net/
> Archives are at:
> //www.freelists.org/archives/leicareflex/
>
------
Unsubscribe or change to/from Digest Mode at:
http://www.lrflex.furnfeather.net/
Archives are at:
//www.freelists.org/archives/leicareflex/
------
Unsubscribe or change to/from Digest Mode at:
http://www.lrflex.furnfeather.net/
Archives are at:
//www.freelists.org/archives/leicareflex/
Other related posts:
