stupid question about 15/4.5 on the R-D1

[morgan]

So I have a cv 15mm that I used successfully on my R2A and bessa-R. Scale focus and shoot. It always had just about unlimited dof and sharpness. On the R-D1, does it work the same way? I had sent mine off for repair because I thought it was broken (due to the results I was getting on my R-D1). It came back (apparently fixed). But I'm seeing the same thing; really out of focus shots, especially wide open at 4.5. I can post some samples. But is there a huge difference on using this lens on the R-D1 compared to a film camera (other than it now being a 21)? Sorry if this is a dumb question, but this is driving me nuts.

 

[back alley]

it's closer to a 23mm...

my 15 works the same on the rd1 and the zi.
i use it the same way too, just set hyperfocal distance and then point and shoot.
i did get an rd15 finder for it and my framing is better now.

joe

 

[morgan]

it's closer to a 23mm...

my 15 works the same on the rd1 and the zi.
i use it the same way too, just set hyperfocal distance and then point and shoot.
i did get an rd15 finder for it and my framing is better now.

joe

No weird issues wide open?

 

[back alley]

not that i noticed. you can check my flickr for some 15 mm shots.
i think most of the indoor market shots are at max aperture.

 

[le vrai rdu]

So I have a cv 15mm that I used successfully on my R2A and bessa-R. Scale focus and shoot. It always had just about unlimited dof and sharpness. On the R-D1, does it work the same way? I had sent mine off for repair because I thought it was broken (due to the results I was getting on my R-D1). It came back (apparently fixed). But I'm seeing the same thing; really out of focus shots, especially wide open at 4.5. I can post some samples. But is there a huge difference on using this lens on the R-D1 compared to a film camera (other than it now being a 21)? Sorry if this is a dumb question, but this is driving me nuts.

trouble with the RF maybe ?

EDIT : no, the 15 mm is not rf coupled 😀 , did you tried to focus wide open at the infinity ?

 

[morgan]

Just did some tests. Ugh, pretty sure this is user error :-(
It focuses fine at infinity. Closer though, not so much. Definitely sharper stopped down a bit. It's just about dark here but will spend more time tomorrow. I'm an idiot.

 

[le vrai rdu]

that's allways the trouble, when there is a trouble everyone tend to be a bit fussy 😉 😀

 

[morgan]

that's allways the trouble, when there is a trouble everyone tend to be a bit fussy 😉 😀

Ha. So true.🙂

 

[back alley]

about how close does it start to get fuzzy?

drinking more coffee lately?

joe

 

[morgan]

Ha. I'm up to a double espresso. The image is out of focus when shot at the closes distance. It doesn't get reasonably focused (even closer objects) until about 2.5 mark.

 

[kxl]

Remember that your hyperfocal distance is different when going from 35mm film to the R-D1s.

Using the 15mm @ f8:

Using your R2A, hyperfocal distance is about 1 meter, so everything from .5 meter to infinity will be in focus.

Using your R-d1s, hyperfocal distance is roughly 1.5 meter, so everything from .75 meter to infinity is in focus.

So, if you mount your 15mm on your R-d1s and set focus at 1 meter like you would with your R2A, you are NOT at the hyperfocal distance. Instead, you will only have a limited range in focus -- from a little less than half a meter to about 2.3 meters.

 

[axiom]

I think the new 15/4.5 is RF coupled

 

[morgan]

Remember that your hyperfocal distance is different when going from 35mm film to the R-D1s.

Using the 15mm @ f8:

Using your R2A, hyperfocal distance is about 1 meter, so everything from .5 meter to infinity will be in focus.

Using your R-d1s, hyperfocal distance is roughly 1.5 meter, so everything from .75 meter to infinity is in focus.

So, if you mount your 15mm on your R-d1s and set focus at 1 meter like you would with your R2A, you are NOT at the hyperfocal distance. Instead, you will only have a limited range in focus -- from a little less than half a meter to about 2.3 meters.

Thanks! That's pretty much what I've figured out, but it's good to see it spelled out like that.

 

[f16sunshine]

You will see some smearing with the rd1 and also pronounce vignetting. Other than that I have had good success with the cv15 (original version). I
stoked for the new version that is threaded for filters 🙂

 

[back alley]

Remember that your hyperfocal distance is different when going from 35mm film to the R-D1s.

Using the 15mm @ f8:

Using your R2A, hyperfocal distance is about 1 meter, so everything from .5 meter to infinity will be in focus.

Using your R-d1s, hyperfocal distance is roughly 1.5 meter, so everything from .75 meter to infinity is in focus.

So, if you mount your 15mm on your R-d1s and set focus at 1 meter like you would with your R2A, you are NOT at the hyperfocal distance. Instead, you will only have a limited range in focus -- from a little less than half a meter to about 2.3 meters.

i don't understand this...as this is what i do, if i set the aperture at f8 i then move the infinity mark on the lens to 8 and the corresponding f8 shows .5 metres and it works like a charm for me.
joe

 

[Eyal_bin]

i don't understand this...as this is what i do, if i set the aperture at f8 i then move the infinity mark on the lens to 8 and the corresponding f8 shows .5 metres and it works like a charm for me.
joe

Same for me, not only @f/8, but on all f stops. hyperfocal space is always accurate and reliable. I have tested this issue extensively, and I use it almost on daily base.😕

 

[morgan]

So how should this lens work on the R-D1? If I set a very close focus distance @ 4.5, should the entire frame be out of focus? That's what's happening. I didn't see this on the R2A.

 

[Eyal_bin]

So how should this lens work on the R-D1? If I set a very close focus distance @ 4.5, should the entire frame be out of focus? That's what's happening. I didn't see this on the R2A.

If you set it to vey close focus point at f/4.5 then you are NOT in the hyperfocal space, I don't know how close is your focusing point, and I don't have the camera with me right now, so I can't tell you for sure what will be the focus zone, but I am astimating that at f/4.5 and focus at 0.5 meters, the focus zone will be something from 0.4m to 1m.
I do know that when I shoot while at f/4.5, I set the focus to infinity, and everything is in focus from ~1.5m to infinity. this is great for street photography.

 

[Steve Litt]

http://www.dofmaster.com/doftable.html

Hi
Using the dept of field table just change the drop down boxes to 15mm, epson rd-1 and feet and meters and you can see all the permutations.

Regards
Steve

 

[kxl]

i don't understand this...as this is what i do, if i set the aperture at f8 i then move the infinity mark on the lens to 8 and the corresponding f8 shows .5 metres and it works like a charm for me.
joe

Hi Joe - if I understand you correctly, you are aligning the infinity mark over '8' on the DOF scale. By doing this, what value on the distance scale is aligning with the f-stop hash mark? I assume it a value of something like 7-10 feet?

Since 7-10 is greater than the hyperfocal distance of a 15mm on an R-D1s @ f8, everything from about 1/3 in front (roughly a little over 4 feet if the scale aligns with 7) to infinity will be in focus.

It's less critical on such a wide angle (and more difficult to illustrate) because of the massive DOF for that lens. If you mount a 50mm lens, it's pretty straightforward to see the effects of using the distance scales and hyperfocal diatance.