Hi all photographers and experts/tinkers/inventors and birders here.
A very big praise to all. A great forum with very familiar terms and a lot of tipps and knowledge and wonderful pictures.
For years, I am a "read-only-user" of this forum, because my English is not really good (SORRY!) Google Translator is my best friend. Now it is time to learn and practice the English language and convert to a "read-and-write-user". |;|
Some informations to my person.
I come from the south of germany near Stuttgart. I'm 55 year old.
I have been photographing the beautiful nature, flowers, mushrooms, animals and landscapes for many years.
I'm active from the old analog Minolta X700 to the modern Pentax K3II with an TS APO 80/480 scope and a lot of old and very old lenses.
I am very interested in all kinds of tinkering around cameras, lenses and accessories.
Now my question:
The sharpness of a good apochromat is perfect for birding photography. My problem is the extremely small depth of focus field.
The eye is sharp, the beak and tail are already in the blurred area.
My questions to the experts/engineers: What is the better solution (image quality) for an aperture?
a) At the front end of the dew cap ((simple construction))
b) In the tube between optic and focuser?
c) At the back end near to the camera (not so simple)
Does anyone have experience with the construction of a diaphragm (perhaps from an old photo lens) at the scope?
Thank you and best regards
Jörg
A very big praise to all. A great forum with very familiar terms and a lot of tipps and knowledge and wonderful pictures.
For years, I am a "read-only-user" of this forum, because my English is not really good (SORRY!) Google Translator is my best friend. Now it is time to learn and practice the English language and convert to a "read-and-write-user". |;|
Some informations to my person.
I come from the south of germany near Stuttgart. I'm 55 year old.
I have been photographing the beautiful nature, flowers, mushrooms, animals and landscapes for many years.
I'm active from the old analog Minolta X700 to the modern Pentax K3II with an TS APO 80/480 scope and a lot of old and very old lenses.
I am very interested in all kinds of tinkering around cameras, lenses and accessories.
Now my question:
The sharpness of a good apochromat is perfect for birding photography. My problem is the extremely small depth of focus field.
The eye is sharp, the beak and tail are already in the blurred area.
My questions to the experts/engineers: What is the better solution (image quality) for an aperture?
a) At the front end of the dew cap ((simple construction))
b) In the tube between optic and focuser?
c) At the back end near to the camera (not so simple)
Does anyone have experience with the construction of a diaphragm (perhaps from an old photo lens) at the scope?
Thank you and best regards
Jörg