Understanding camera settings...

sujoyp

sujoyp

Grand Master
ISO mode??? u mean use of aperture,shutter speed and ISO togather :)

The most simple wayy to learn is to read the basic in books and then just test and test...play with settings...u will learn soon

initially i used to take pic in automode and then check its exif settings to understand how much of these 3 r needed in what conditions :)
 
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mastervk

In the zone
nac said:
Mastervk, Thank you... The thing, is even after processing, jpeg seems to be better. Working on RAW images take time to get a desired result while the same is done (jpeg) by the camera very quickly.
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It all depends on your processing skills..You can process jpegs also and it will look good to you most probably..those who shoot in RAW dont want to loose any information before processing..also its easy to change white balance and expose in RAW..

i shoot in RAW because i have 16 GB card so space is not a problem( 1 RAW = 24 MB for my DSLR) and many times i want to process image myself...sometimes when i am nearly out of space or i am shooting lots of pics and i know that i will not be able to process all of them i might shoot jpeg..
 
M

mastervk

In the zone
nac said:
That's true. :oops:

:pssst: Can you tell me how to process RAW to get much better than jpeg.
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I dont have good processing skills..maybe some other member who has worked more on PS/LR can explain the process better..

i generally import the photos in Lightroom,apply tag..rate them and delete bad pics..then select individual pics and change WB/exposure etc if required..sometimes i apply BW filter or any other effect..in case of pic with lots of noise run noise removal program..apply sharpening and then export the pics in high quality jpeg format...
 
OP
nac

nac

Aspiring Novelist
A new find...

I don't know how many of us know aperture size of compact is not equal to full frame camera's. I have heard about it before and didn't mind much until rhitwick raised :?: Thanks for that rhitwick. We always see focal length of compact in 35mm equivalent like 28-336 for SX130 (which is actually 5-60) but not aperture in 35mm equivalent. Relative aperture value is same but focal length of compacts are low. That means true aperture is small. Aperture value of compact camera (SX130) f/3.4 is equal to f/19 in full frame camera. This is the largest aperture in SX130, and it has an infinity DOF when focusing little above 2 feet.

In general, even DSLR users don't use beyond f/22 or not recommended to use as it gives soft images. Guess how the image will be when you use f/8 in compact (it's equal to f/45 in full frame).

So what's my point here??? Even at the largest aperture, compact camera have more DOF than full frame. Using smaller Av in compact camera will give you softer image. Don't push to smaller aperture as it won't give you sharper image. Try to stay around f/3.4 or larger.

Compact cameras don't have much control over shallow focus but deep focus. Now we know why compact cameras don't produce bokeh as good as DSLR. Even the largest available f.no for compact is f/1.8, i.e., f/10 in full frame camera.
 
sujoyp

sujoyp

Grand Master
@nac I agree with the focal length thing ...but totally disagree with the aperture thing...please provide me a source which tells this theory..
Also the idle aperture is said to be 2 stops below the largest aperture thats like for 50mm 1.8 its f4 or for a 70-200 2.8 its f5.6
idle in the sense of sharpest and most used....but its just theory :D

f8 or compact = f45 of full frame is just an impossible theory
 
OP
nac

nac

Aspiring Novelist
It seems to be a possible one.

I thought of going in detail which I didn't understand fully at the first place. Like yours have crop factor of 1.5x, ours got a crop factor of 5.6x. And the numbers I said was my calculations based on the things I read. If there is any wrong in it, that's me. But I don't think there is any...

I have read it from many sites. I don't have the address for all of 'em. Here are some of them...

DOF

Quoting Wiki
In many cases, the DOF is fixed by the requirements of the desired image. For a given DOF and field of view, the required f-number is proportional to the format size. For example, if a 35 mm camera required f/11, a 4×5 camera would require f/45 to give the same DOF.
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I didn't know what is 4x5 camera when I was researching before buying my first cam. It is a bigger format camera (4 times bigger) than full frame.

DSLR vs COMPACT - BOKEH

APERTURE: DSLR vs COMPACT

APERTURE RANGE OF COMPACTS

WIDE AV RANGE IN COMPACTS?

DOF TESTING

XZ-1 vs DSLR

APERTURE SETTINGS ON COMPACT vs DSLR

There may not be the exact things I talked about in all the links. But there should be some bits and pieces.
 
sujoyp

sujoyp

Grand Master
The bigger sensor then full frame is called medium format...

I read all those article and there is no formula ...there are only relative estimation like an f11 at 50mm lens@apsc sensor = f3.3 @S90 p&S

these r just result of some experiment and no science behind it. they estimated this using the background blurring and light in the picture.

like i told you f8 on compact = f45 of full frame is just an impossible theory thats coz f45 will be soo small aperture that even in daylight u may not be able to take pics, but thats not case with a f8 of a compact cam :)
 
OP
nac

nac

Aspiring Novelist
Hmmm....

I don't have the equipments to try that... But you do... You can try and share the result with us.

Stick to the same focal length in 35mm equivalent. I guess you no need a table for this.

Try the following Av where both the cameras have them or close to that.

T100 - Av D3100 - Av
3.5 13.8173
3.6 14.21208
3.7 14.60686
3.8 15.00164
3.9 15.39642
4 15.7912
4.1 16.18598
4.2 16.58076
4.3 16.97554
4.4 17.37032

Use whatever things are necessary to maintain a similar result like using tripod etc...
 
marvelousprashant

marvelousprashant

Cyborg Agent
I took shots with Image stabilization on and off and IS really improves the quality by reducing blur. Unusual and stupid question but why is there an option to turn it off ??

If i use a tripod then IS is not needed . Will switching off IS impact image quality in that case ?
 
OP
nac

nac

Aspiring Novelist
I have read in many places, that we should turn off IS when we use tripod. If you leave the IS turned ON when camera is on the tripod, camera tends to look for movements and would give you some blur in your image. But I have never turned OFF IS even when I left my camera in stable flat surface to take the image. I don't know how the image would have come out if I turned OFF.
 
sujoyp

sujoyp

Grand Master
IS should be turned off coz to resist hand vibration it moves itself a bit...i mean maybe it vibrates itself a bit...when placed on tripod it will give u some slight vibration in the pic...also IS takes time to get engaged and it makes it slower to take shots
 
M

mastervk

In the zone
marvelousprashant said:
I took shots with Image stabilization on and off and IS really improves the quality by reducing blur. Unusual and stupid question but why is there an option to turn it off ??

If i use a tripod then IS is not needed . Will switching off IS impact image quality in that case ?
Click to expand...
some people like to turn IS off while using tripod..they think using IS on tripod might affect image quality..i have read many articles on IS and based on them even if you keep it on ,IS will not affect the quality...
i think some lens will detect if they are mounted on tripod and will not us IS...
 
sujoyp

sujoyp

Grand Master
IS definitely slow down the whole pic taking process...if u r shooting above 1/800 then its better to stop IS..

when taking a pic after u set the focus u engage the IS and then u shoot...if IS is not there u can just focus and shoot

but in low light IS definitely helps a lot
 
OP
nac

nac

Aspiring Novelist
Do you guys have any idea about this???

Sensor 1/2.3" = It should be 0.43" sensor
But 6.17x4.55 (dimension of 1/2.3" sensor) gives us 0.3" sensor.

How they call a .3" sensor as 1/2.3"?
 
OP
nac

nac

Aspiring Novelist
Found the answer...

Quoting dpreview
Sensors are often referred to with a "type" designation using imperial fractions such as 1/1.8" or 2/3" which are larger than the actual sensor diameters. The type designation harks back to a set of standard sizes given to TV camera tubes in the 50's. These sizes were typically 1/2", 2/3" etc. The size designation does not define the diagonal of the sensor area but rather the outer diameter of the long glass envelope of the tube. Engineers soon discovered that for various reasons the usable area of this imaging plane was approximately two thirds of the designated size. This designation has clearly stuck (although it should have been thrown out long ago). There appears to be no specific mathematical relationship between the diameter of the imaging circle and the sensor size, although it is always roughly two thirds.
Click to expand...
 
OP
nac

nac

Aspiring Novelist
A doubt regarding shutter speed.

Two different format cameras (say 4/3 and 35mm camera).
4/3's crop factors is 2.
We shoot the same subject from same distance using Aperture priority mode. Same settings in both the cameras. (say f/3.5, ISO 100)
As f/3.5 is lets more light in 35mm format camera than the 4/3s, does it shoot the subject one stop faster than the 4/3s?
For eg: If 4/3s requires 1/30 sec, 35mm will do the same at 1/60 sec?
 
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