KellyH
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- First AnswerDecember 13, 2007
- Last AnswerJanuary 31, 2011
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What does "f/2.8" mean?
First, what does "f" mean? Second, what's the difference between a "f/4" and a "f/2.8"? It looks like f/2.8 lenses are higher priced, so does that mean they're better?
First off...f refers to f stop..or feet stop. An early way of measuring the strength of light was by counting how many feet away from a candle the light was still seen. Sometimes known as "Foot Candles".
In reference to a lens it is how much light is let in to expose the film/sensor of a camera. The number refers to the size of the opening, the larger the number the smaller the hole....smaller the number the larger the hole and sometimes the lens. (see illustration)
Lenses with a good f/ stop..say f/1.4 to f/2.8 are more desirable, and more expensive, because they are what are called a "Fast Lens", allowing you to use a faster shutter speed. This give you more control over depth of field (DOF) and the ability to freeze action shots better such as sports photography.
In reference to a lens it is how much light is let in to expose the film/sensor of a camera. The number refers to the size of the opening, the larger the number the smaller the hole....smaller the number the larger the hole and sometimes the lens. (see illustration)
Lenses with a good f/ stop..say f/1.4 to f/2.8 are more desirable, and more expensive, because they are what are called a "Fast Lens", allowing you to use a faster shutter speed. This give you more control over depth of field (DOF) and the ability to freeze action shots better such as sports photography.
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14 years, 10 months ago
by
Posted by:
KellyH
from
Alamogordo, NM
Sensor Size/Quality
I'm looking at two cameras. One has a 6 MB sensor, but the sensor is big (24 x 36 mm). The other has a 10.1 M sensor, but it's small (15 x 15 mm). I've also noticed that on many cameras with bigger zoom ranges, the sensor is smaller than in an equivalent camera with a smaller zoom range. So are all pixels equal? Or do some carry more/better information than others?
The 24x36 camera uses a full size sensor. That is a sensor that is the same size as a 35mm camera. This will give you a clearer image than the 15x15 sensor. Less color bleed. More surface area helps with that.
Even though the 15x15 is a 10mp sensor the larger sensor will give you a better looking enlargement.
Even though the 15x15 is a 10mp sensor the larger sensor will give you a better looking enlargement.
14 years, 10 months ago
by
Posted by:
KellyH
from
Alamogordo, NM
What does Digital SLR mean?
Digital-SLR refers to a digital version of a 35mm Single Lens Reflex (SLR) camera.
Single Lens being only one lens used so the viewfinder shows what the lens sees. Reflex refers to the prism or mirror that is used to reflect the image to the viewfinder. The mirror then flips out of the way allowing the image to expose the sensor when the shutter button is pushed.
Single Lens being only one lens used so the viewfinder shows what the lens sees. Reflex refers to the prism or mirror that is used to reflect the image to the viewfinder. The mirror then flips out of the way allowing the image to expose the sensor when the shutter button is pushed.
14 years, 10 months ago
by
Posted by:
KellyH
from
Alamogordo, NM
what is the best zoom lens
nikon d80 camera
A generally all around good zoom lens is the 70-300mm.
Tamron recently released a 18-270mm all purpose lens.
Tamron recently released a 18-270mm all purpose lens.
Products from my answer
Nikon - AF-S VR Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED Telephoto Zoom Lens - Black
(323)14 years, 10 months ago
by
Posted by:
KellyH
from
Alamogordo, NM
Does "burst shooting" allow me to take a photo immediately (no lag) and do any "point and shoot" Olympus cameras have this feature?
Burst mode is for taking a series of photos in a row. Once the cameras has set itself for lighting conditions and exposure there should be no lag time while in burst mode unless conditions change drastically. Burst is more common on D-SLR cameras and rare on compacts.
The E-P1 has burst mode as do the Olympus D-SLR models.
The E-P1 has burst mode as do the Olympus D-SLR models.
Products from my answer
Olympus - 12.3-Megapixel Digital Camera
14 years, 10 months ago
by
Posted by:
KellyH
from
Alamogordo, NM
Nikon D90 or Nikon d5000?
Im not sure what I would like to buy... Ive heard they smilar pero the d90 is better manufactured? Is that right?
Both cameras have useful features depending on your shooting habits and interests.
The D90, among other things shoots in full HD at cinema 24fps where as the D5000 shots at 720p.
Both have Live View but only the D5000 has a tilt/swivel screen.
Both cameras have a metal chassis but the D5000 is physically smaller than the D90.
If you can, try both cameras at a demo area and see which one feels better in YOUR hands. See which button layouts work well for you. Maybe that will help with your decisions. You cant go wrong with either one.
The D90, among other things shoots in full HD at cinema 24fps where as the D5000 shots at 720p.
Both have Live View but only the D5000 has a tilt/swivel screen.
Both cameras have a metal chassis but the D5000 is physically smaller than the D90.
If you can, try both cameras at a demo area and see which one feels better in YOUR hands. See which button layouts work well for you. Maybe that will help with your decisions. You cant go wrong with either one.
14 years, 10 months ago
by
Posted by:
KellyH
from
Alamogordo, NM
Canon EOS XTi versus NikonD90?
I'm confused as to what dslr camera to buy. Nikon D90 costs more than Canon XTi, but is it worth it to go to Nikon D90 or I could just settle with the Canon EOS xTi and save around $400+?
The Nikon D90 has many more features over the Canon XTi. Some being.... More megapixels. Plus HD movie mode.
You may find you will not out grow the D90 as fast as you would the XTI. The D90 is closer to PRO camera than the XTi.
You may find you will not out grow the D90 as fast as you would the XTI. The D90 is closer to PRO camera than the XTi.
14 years, 10 months ago
by
Posted by:
KellyH
from
Alamogordo, NM
camera usb drive!
i lost my nikon cool pix usb cord... what or where can i get one???
Check you nearest BestBuy. They might have a universal USB cable set that connects to many different connection types.
Take your camera with you. CoolPix models have different connectors between models.
Take your camera with you. CoolPix models have different connectors between models.
14 years, 10 months ago
by
Posted by:
KellyH
from
Alamogordo, NM
I need a camera that won't delay when you take the picture?
I have a 2yr old - when you go to snap a picture it needs to take right then or the child won't be in the picture. I need a digital camera that won't delay.
This is a common complaint about compact cameras. It's known as Shutter Lag Time.
Some compact cameras are known to have a lag time as high as 2-3 seconds.
Digital -SLR cameras are much faster and will give you a better picture, more control over shooting conditions and almost no lag time ( usually under .10 seconds).
Canon, Nikon and Sony all have great entry level D-SLR cameras.
Some compact cameras are known to have a lag time as high as 2-3 seconds.
Digital -SLR cameras are much faster and will give you a better picture, more control over shooting conditions and almost no lag time ( usually under .10 seconds).
Canon, Nikon and Sony all have great entry level D-SLR cameras.
Products from my answer
Sony - Alpha 10.2-Megapixel Digital SLR Camera - Black
14 years, 10 months ago
by
Posted by:
KellyH
from
Alamogordo, NM
Does one brand of lens fit another brand of camera?
If I have a Canon camera will a Pentax lens fit onto it? or is it better to stick with the smae brand of lens as my camera?
You can find some adapter/converters online. These allow you to use lenses from one manufacturer on another. This will change the zoom factor slightly.
Some companies like Sigma and Tamron make the same lenses model for different cameras.
Some companies like Sigma and Tamron make the same lenses model for different cameras.
14 years, 10 months ago
by
Posted by:
KellyH
from
Alamogordo, NM