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Manual Focus
May 21, 2019 16:43:38   #
LPigott Loc: Monterey Peninsula, CA
 
Taking an Adv. Photography class we were given an assignment to utilize Manual Focus. Found I could grab a photo previously unavailable to me. Getting this close in a dark area prevented the Auto Focus from functioning. MF did the trick. Feel I gained a useful option for a difficult situation ...



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May 21, 2019 16:54:54   #
Architect1776 Loc: In my mind
 
LPigott wrote:
Taking an Adv. Photography class we were given an assignment to utilize Manual Focus. Found I could grab a photo previously unavailable to me. Getting this close in a dark area prevented the Auto Focus from functioning. MF did the trick. Feel I gained a useful option for a difficult situation ...



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May 21, 2019 17:01:32   #
Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)
 
Architect1776 wrote:


This is good, but I hope that the instructor covered the differences between the old DSLR cameras and the current ones.

There are two fundamental and important differences

Old cameras have great focusing aids in addition to a ground glass. Older cameras had either microprism or split prism or both.
Older lenses had a longer "throw" on the focus ring - half a turn or more, making it easier to fine tune focus. Newer lenses have 1/4 turn at most. A slight movement on the focus ring gets you out of focus quickly.

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May 21, 2019 17:35:10   #
jpgto Loc: North East Tennessee
 
Experimenting is always fun and the results are amazing.

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May 21, 2019 19:03:36   #
Architect1776 Loc: In my mind
 
Gene51 wrote:
This is good, but I hope that the instructor covered the differences between the old DSLR cameras and the current ones.

There are two fundamental and important differences

Old cameras have great focusing aids in addition to a ground glass. Older cameras had either microprism or split prism or both.
Older lenses had a longer "throw" on the focus ring - half a turn or more, making it easier to fine tune focus. Newer lenses have 1/4 turn at most. A slight movement on the focus ring gets you out of focus quickly.
This is good, but I hope that the instructor cover... (show quote)


Don't the AF macro lenses have a long throw inspite of being AF lenses?
I agree that most AF are more difficult to manually focus with the short throw and no focus visual aids.
Thank you for the great post and helpful to me, at least, post.

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May 21, 2019 19:28:58   #
rgrenaderphoto Loc: Hollywood, CA
 
LPigott wrote:
Taking an Adv. Photography class we were given an assignment to utilize Manual Focus. Found I could grab a photo previously unavailable to me. Getting this close in a dark area prevented the Auto Focus from functioning. MF did the trick. Feel I gained a useful option for a difficult situation ...


Nice. Are you using the Live View screen with maximum magnification to confirm focus?

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May 22, 2019 08:44:19   #
Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga
 
Architect1776 wrote:
Don't the AF macro lenses have a long throw inspite of being AF lenses?
I agree that most AF are more difficult to manually focus with the short throw and no focus visual aids.
Thank you for the great post and helpful to me, at least, post.


My AF macro lenses have long throws... I think the AF macros are the only AF ones that do....

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May 22, 2019 10:13:45   #
Architect1776 Loc: In my mind
 
Screamin Scott wrote:
My AF macro lenses have long throws... I think the AF macros are the only AF ones that do....


I figured that they did.
I just didn't have access to mine when I answered.
Thank you so much for the confirmation on the macro having a long throw.

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May 22, 2019 10:37:12   #
agillot
 
i almost never auto focus . doing it by hand force you to see what you are doing .

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May 22, 2019 16:52:38   #
FiddleMaker Loc: Merrimac, MA
 
Gene51 wrote:
This is good, but I hope that the instructor covered the differences between the old DSLR cameras and the current ones.

There are two fundamental and important differences

Old cameras have great focusing aids in addition to a ground glass. Older cameras had either microprism or split prism or both.
Older lenses had a longer "throw" on the focus ring - half a turn or more, making it easier to fine tune focus. Newer lenses have 1/4 turn at most. A slight movement on the focus ring gets you out of focus quickly.
This is good, but I hope that the instructor cover... (show quote)

Very helpful info. thanks for posting .

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