Beautiful results..

And I never heard of a "Violaceous Turaco" before,
but I'll never forget it!

'Honey,.... I'm feeling...
.....a bit
..........violaceous
...........................tonight..."

BebuLamar said..
"You don't understand or you want to test us? The 105 transmits more light to the sensor because it transmit light from a larger area of the subject."

I agree with your statement, and also believe that the Wikipedia-copied info. is sufficient to answering the question asked...


On rereading the Wikipedia copy-and-quote, I find ::

........."But compared to the 100 mm lens, the 200 mm lens projects an image of each object
twice as high and twice as wide, covering four times the area, ...."

....I think your statement is far less likely to lead to confusion,!
Though they arise in response to the same issue,
they come from different perspectives.
==================

EDIT: As a newbie, i've not yet learned to seek beyond the lowest boundary of "page 1",
which I just noted and will not probably repeat..

A while back I bought a ST101, (about 50 years ago)
with which I probably took the best pictures of my photographic-tyro career.
I kept notes as I shot,
and had to line up a indicator needle with a "block",
the involvement with which (simple though it was), made me a better photographer.

I bought several lenses, and by and by they became stolen, one and all,
from the trunk of my car.
As time went by, I bought several Minoltas, of newer vintage,
but gave them away to a student.
I have a couple of old lenses I'd like to try to use,
but I need an adapter, and that's where my question comes in.

Currently I've 3 cameras:
KM 5D, Sony A 700, and Sony A65V.(mirrorless)
All APS-C.

Will AN ADAPTER oops enable using a 35MM-intended lens
on an APS_C alpha sensor?(of course, auto functions will be disabled.)

Were I to acquire a full-frame sensor (such as the alpha 850), would the answer be the same?

Thank you.

Agree. Color is better imho.

Copying from Wikipedia:

Ignoring differences in light transmission efficiency,
a lens with a greater f-number projects darker images.
The brightness of the projected image (illuminance)
relative to the brightness of the scene in the lens's field of view (luminance)
decreases with the square of the f-number.

Doubling the f-number decreases the relative brightness by a factor of four.
To maintain the same photographic exposure when doubling the f-number,
the exposure time would need to be four times as long.

Most lenses have an adjustable diaphragm,
which changes the size of the aperture stop and thus the entrance pupil size.
The entrance pupil diameter is not necessarily equal to the aperture stop diameter,
because of the magnifying effect of lens elements in front of the aperture.

A 100 mm focal length f/4 lens has an entrance pupil diameter of 25 mm.
A 200 mm focal length f/4 lens has an entrance pupil diameter of 50 mm.
The 200 mm lens's entrance pupil has four times the area of the 100 mm lens's entrance pupil,
and thus collects four times as much light from each object in the lens's field of view.


But compared to the 100 mm lens, the 200 mm lens projects an image of each object
twice as high and twice as wide, covering four times the area,
and so both lenses produce the same illuminance at the focal plane
when imaging a scene of a given luminance.

Most of the stuff I used to get excited about... isn't important.
If I forget a name, I forgive myself, and without the anxiety, it frequently pops up.

I've learned that this utility ME thought, that talks and writes, and interfaces with folks,
and seeks to get it's way, (and to hell with any consideration of others)..
is not the greater part of who/what I am,
though I could not say what the silent/accepting part is.

I'm comfortable with that.

^^truly "General Chit-Chat"^^

I love quail, and that 'uns gonna be my desktop background.
THX!
David

Without touching the variations attending to the dissection of words such as "grip, hold, support, caress, and fondle", as they apply to pointing the camera at what you wish to memorialize in image,
I will add to the comments about breath:
1. deep breath and exhale.
2. deep breath and exhale about 1/3 and lock/hold exhalation
3. press the trigger, uh, I mean button.
4. Commence breathing normally.

There's also (similar to shooting) some manipulations using the strap
which are helpful:
better a picture, though, than a thousand words. (imho)

I'm not the photographer that many here have become, but the advice given as:

"You might want to consider used models
where you can buy much more camera
for the same or lower prices "

resonates with me.

I was a confirmed Minolta guy:
and despite their ins and outs..
the assumption of the "a-lense" mount by Sony, has saved a lot of $$ for me.

Although my Sony A-65v is way ahead of my skills in operating it,
(and therefore completely fulfilling my "needs".)..
I've always wanted a better camera than I was willing to afford...

so recently acquired a Sony a-700, (Discontinued ~10 years ago)
[which was way out of my price range when new,]
for less than 10% of it's original value.
It is a pleasure to use, though it does "only" have 12.4M pixels,
as compared to twice that on the newer camera.

I would rather buy a used great camera than a new "kinda OK" one.