Streetshooter
Subscriber Member
John,
Actually, with the name of this thread and the discussion, I'd love to see your results from both cameras posted here. It's your choice.
Don
The GetDPI Photography Forum
Great to see you here. Join our insightful photographic forum today and start tapping into a huge wealth of photographic knowledge. Completing our simple registration process will allow you to gain access to exclusive content, add your own topics and posts, share your work and connect with other members through your own private inbox! And don’t forget to say hi!
Is GF1 is E-P1 killer?
- Thread starter sagar
- Start date
Actually, with the name of this thread and the discussion, I'd love to see your results from both cameras posted here. It's your choice.
Don
m3photo
New member
Here to Learn
I'll second these very same words as I'm sure many others will. This is precisely why many return here on a daily basis and tend to shy away from the likes of DPR where nowadays one learns very little and sharing is a thing of the past.
m3photo
New member
Re: Alcohol
"Reality is an Illusion Produced by the Lack of Alcohol". I thought it fitted quite nicely in the philosophy of photography and makes me chuckle to see you folk talking of unwinding at the bar
The best definition I've ever seen was scrawled in the men's in a pub in the Strand:
"Reality is an Illusion Produced by the Lack of Alcohol". I thought it fitted quite nicely in the philosophy of photography and makes me chuckle to see you folk talking of unwinding at the bar
G
Gakuranman
Guest
This is great advice! I have been considering how to use the PEN as a street-cam. I wonder if you wouldn't mind me asking about hyperfocal distances though, or direct me to a site that explains them. In my naivety I wonder why just focussing at infinity wouldn't achieve the same effect as focussing at the floor 6 feet below..?
Streetshooter
Subscriber Member
I will try....
At hyper focal you get everything in a focus zone from 1/2 the Hyper focal distance to infinity.
So at f11 for example with the Pen and 17mm,
your good from about 2.75' out.
By focusing at a different distance you start to loose the foregroung and/or infinity.
There's talk bout diffraction as you use smaller f stops but I ain't never seen it but I hear stories about it. I think it's bunk myself...
But I'm always diffracted. We don't have that stuff here in Philly.
Remember, we live in/by the inverse square law.
Less is more/ more is less.
I will post the distances for you if you like for each f stop.
Shooter
At hyper focal you get everything in a focus zone from 1/2 the Hyper focal distance to infinity.
So at f11 for example with the Pen and 17mm,
your good from about 2.75' out.
By focusing at a different distance you start to loose the foregroung and/or infinity.
There's talk bout diffraction as you use smaller f stops but I ain't never seen it but I hear stories about it. I think it's bunk myself...
But I'm always diffracted. We don't have that stuff here in Philly.
Remember, we live in/by the inverse square law.
Less is more/ more is less.
I will post the distances for you if you like for each f stop.
Shooter
G
Gakuranman
Guest
I'd really appreciate if you could post those distances! It's a little late now, so I'm going to read over what you wrote again tomorrow
Streetshooter
Subscriber Member
Here they are for the 17mm on the Pen....
f stop Hyper focal Distance
2.8 ..... 22.4'
4.0 ..... 15.9'
5.6 ..... 11.2'
8.0 ..... 7.96'
11.0 ..... 5.6'
16.0 ..... 4.01'
Remember that at any of the given distances the depth of field covers from 1/2 that distance to infinity.
(For some reason unknown to me, this is supposed to work in meters too....)
Any other questions, I am at your service....
shooter
f stop Hyper focal Distance
2.8 ..... 22.4'
4.0 ..... 15.9'
5.6 ..... 11.2'
8.0 ..... 7.96'
11.0 ..... 5.6'
16.0 ..... 4.01'
Remember that at any of the given distances the depth of field covers from 1/2 that distance to infinity.
(For some reason unknown to me, this is supposed to work in meters too....)
Any other questions, I am at your service....
shooter
M
meilicke
Guest
Shooter, what is the formula? I guess I could look it up . It is interesting because the f stop and distance pattern.
-Scott
. It is interesting because the f stop and distance pattern.-Scott
Streetshooter
Subscriber Member
The formula?
The law actually. I try never to break it cause then I would need AF.
Try to see it as.... Changing f stops brings the DOF nearer to you. Infinity is always at the other end. So you determine how close you want to be to keep things in...
Then adjust the f stop to suite.
There is a mathamatical formula but it has nothing to do with making images.
The table above is the result of the formula.
Check out dofmaster.com
shooter
The law actually. I try never to break it cause then I would need AF.
Try to see it as.... Changing f stops brings the DOF nearer to you. Infinity is always at the other end. So you determine how close you want to be to keep things in...
Then adjust the f stop to suite.
There is a mathamatical formula but it has nothing to do with making images.
The table above is the result of the formula.
Check out dofmaster.com
shooter
kit laughlin
Subscriber Member
@ m3photo:
"Reality is for those who can't handle drugs!"
Graffito I saw one that appealed immensely.
If anyone has the hyperfocal distances for the 20mm lens, I will be grateful (I assume they are fairly close to the ones for the 17, above).
"Reality is for those who can't handle drugs!"
Graffito I saw one that appealed immensely.
If anyone has the hyperfocal distances for the 20mm lens, I will be grateful (I assume they are fairly close to the ones for the 17, above).
Streetshooter
Subscriber Member
Here ya go...
20mm
f stop Focus distance
1.7 .... 52.1'
2.0 .... 43.8'
2.8 .... 31'
4.0 .... 21.9'
5.6 .... 15.5'
8.0 .... 11'
11.0 .... 7.8'
16.0 .... 5.53'
As before, for some reason it works in meters too....
Ya can see that the 20mm will be slightly challenging on the streets...
The reason I sold my DP2....even with the finder, it's a struggle to get the world in focus...
shooter
20mm
f stop Focus distance
1.7 .... 52.1'
2.0 .... 43.8'
2.8 .... 31'
4.0 .... 21.9'
5.6 .... 15.5'
8.0 .... 11'
11.0 .... 7.8'
16.0 .... 5.53'
As before, for some reason it works in meters too....
Ya can see that the 20mm will be slightly challenging on the streets...
The reason I sold my DP2....even with the finder, it's a struggle to get the world in focus...
shooter
RichA
New member
If the GF1 is only "slightly faster" to focus than the E-P1, then Panasonic did something wrong because the G1 is to the E-P1 what a Ferrari is to a GM Saturn, if you're talking about focusing speed. The latest firmware upgrade also vastly improved the low-light focusing of the G1 so it now keeps up with my Nikon D300, with the same f-ratio lens.
Brian Mosley
New member
I suspect the lens is limiting the CDAF speed... The GF1 should be much faster with the Lumix 14-45 than the E-P1 with the 14-42. To get a true idea of the body differences, you'd need to use the same lens on each body.
The GF1 will still be "slightly faster" but it seems the 20mm f1.7 pancake is using slower, noisier focusing motors presumably due to size constraints... the same route taken by Olympus for their first two kit lenses.
I would personally love a prime, High Grade 17mm f2 with fast focusing motors - forget the pancake design, give me a lens with beautiful bokeh and great IQ.
Kind Regards
Brian
m3photo
New member
Reality
My favourite was on a Canadian girl's T-Shirt about 30 years ago:
"Having abandoned the search for truth, I'm now looking for a damn good fantasy".
Funny that, I started taking pictures around then ...
Very good, yes.
My favourite was on a Canadian girl's T-Shirt about 30 years ago:
"Having abandoned the search for truth, I'm now looking for a damn good fantasy".
Funny that, I started taking pictures around then ...
G
Gakuranman
Guest
Thanks for posting these! This does make it more difficult to do street shooting - but why are the focal lengths so different? It's only a 3mm difference on the lenses..?
Cindy Flood
Super Moderator
At f/11 and subject at 6 feet away
17mm
Near limit of acceptable sharpness 2.91 feet
Far limit of acceptable sharpness Infinity
In front of subject 3.1 feet
behind subject infinite
Hyperfocal distance 5.64 feet
Focus at the hyperfocal distance of 5.64 feet and DOF extends from 2.82 feet to infinity
20mm
Near limit of acceptable sharpness 3.39 feet
Far limit of acceptable sharpness 25.8 feet
In front of subject 2.6 feet
Behind subject 19.8 feet
Hyperfocal distance 7.8 feet
Focus at the hyperfocal distance of 7.8 feet and DOF extends from 3.9 feet to infinity
...using DOFMaster.com
17mm
Near limit of acceptable sharpness 2.91 feet
Far limit of acceptable sharpness Infinity
In front of subject 3.1 feet
behind subject infinite
Hyperfocal distance 5.64 feet
Focus at the hyperfocal distance of 5.64 feet and DOF extends from 2.82 feet to infinity
20mm
Near limit of acceptable sharpness 3.39 feet
Far limit of acceptable sharpness 25.8 feet
In front of subject 2.6 feet
Behind subject 19.8 feet
Hyperfocal distance 7.8 feet
Focus at the hyperfocal distance of 7.8 feet and DOF extends from 3.9 feet to infinity
...using DOFMaster.com
Last edited: