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Anonymous
Not a "WHAT SHOULD I BUY!?" thread but afterall a gear thread, so sorry in advance.

When I adjust my DX lens on my Nikon D50 to 50mm is it the same as if I had a 35mm film camera with a non-DX 50mm lens?
I'm still very confused about this cropfactor thing. Like everyone said for portraits you need at least a 50mm lense. So ok, I'm gonna buy one, but since I have DSLR and are going to buy a film lens it has to be a 35mm lens to get a 50mm result on my DSLR, right? So if you guys are talking about "portrait at least 50mm" is it 50mm as cropped format or REALLY a (film) 50mm lens.

Sorry for being a newfag.
EXIF data available. Clickhereto show/hide.
Camera-Specific Properties:Equipment MakeNIKON CORPORATIONCamera ModelNIKON D50Camera SoftwareVer.1.00Maximum Lens Aperturef/5.7Sensing MethodOne-Chip Color AreaColor Filter Array Pattern670Focal Length (35mm Equiv)82 mmImage-Specific Properties:Horizontal Resolution240 dpiVertical Resolution240 dpiImage Created2008:05:10 00:35:18Exposure Time1/125 secF-Numberf/5.6Exposure ProgramAperture PriorityISO Speed Rating400Lens Aperturef/5.6Exposure Bias0 EVMetering ModeCenter Weighted AverageLight SourceShadeFlashNo FlashFocal Length55.00 mmRenderingNormalExposure ModeAutoWhite BalanceManualScene Capture TypeStandardGain ControlNoneContrastSoftSaturationNormalSharpnessNormalSubject Distance RangeUnknown
>> gear thread Anonymous
a quick browse around google would tell you everything you need..

i'm not a nikonfag, but i'm pretty sure your DX lens is designed for your tiny sensor (like canon's EF-S). so when a DX lens says 50mm, you're shooting 50mm.

since your camera has a small sensor, I.E. it's not full frame (the equivalent size of a 35mm piece of film), any lenses you buy that are designed to work on 35 mm film cameras (or full frame digital) are going to be cropped on your tiny little sensor by a factor of 1.6 or 1.7... i forget what it is for nikon.

anyway, fuck off and dont come back.
>> Anonymous
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>>178182so when a DX lens says 50mm, you're shooting 50mm.

no.. they're all labelled as their true focal lengths

but the fact that you're putting it on a crop camera, you HAVE to apply crop factor

so 50mm gives you the same field of view as 75mm on film
>> Jeremo !iKGMr61IHM
dude, i really like the perspective in this shot.

not sure about the pose of the guy infront though, looks un-natural and forced.

Otherwise great.
>> Martin !!ve2Q1ETWmJH
>>178207
So a DX 50mm would give the same (75mm) field as a standard 50mm?
That cant be right, i'm confused now too :P
>> Anonymous
>>178242So a DX 50mm would give the same (75mm) field as a standard 50mm?

A 50mm on a crop camera would give the same field of view as 75mm on 35mm/full frame.
>> Anonymous
>>178253

On Nikon/Pentax/Sony, obviously. 80mm on Canon and 100mm on Olympus, etc.
>> Anonymous
>>178255
Everything here is completely dependant on the sensor size.
Just like with the changes to medium format or between large format sizes, its the combination of the focal length and the format that determine the field of view.
This 'crop factor' stuff is bullshit and meaningless and just meant as a way to easier explain all of it to retard consumers, but it really just serves to confuse as it evades whats actually happening.

Start out with an 8x10 camera. A 300mm lens on this is a slight wide angle view, if you were to take a picture on 8x10 with a 300mm lens, and then cut out a chunk of the film in the middle that was 24x36 (35mm) you would have the exact same angle of view as you did with a 300mm lens on 35mm, which would of course be a very low angle of view.
People have already explained full frame business so you should know by now that your camera is basically cutting that piece of film even smaller.

a 50mm lens on DX is a portrait length. a 50mm lens on 35mm is a normal length. So basically they told you exactly what you need and you didnt have to freak out about the 'conversion factor'
>> Anonymous
>>178279

that's a pretty piss poor explanation for newfags
>> Anonymous
>>178282
So do it better faggot.
>> Anonymous
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>>178242That cant be right, i'm confused now too :P
>> Anonymous
Multiply whatever the true length- this is what will be on the lens- is by 1.5 and you have the 35mm equivalent for your camera.

Yes, a 35mm lens is the closest you can get to a 50mm equivalent on your camera, but most people seem to prefer wider normals: 30mm or 28mm, and 28mm is almost exactly the perfect "true normal." (A normal lens is one that makes the scene look like it does to human vision.) But pick the one you like and stick with it.

You can do portraits at any focal length- the best one I ever shot was taken at a wide 36mm equivalent- but there's some considered good for it. These are normals (the 28/30/35 discussed above, and all 40-60mm equivalents) and medium telephotos (61-135mm equivalent). These are good because wider or longer lenses tend to distort the face some. Longer lenses are considered more flattering because they flatten the face, and really long ones are often used for fashion photography. Shorter lenses expand it- for instance, making someone's nose pop out. The traditional balance for "a portrait lens" is in the ~80-~90mm equivalent range, though any MT will do just fine. I use a normal for most of my portraits, FWIW.

Also, good photo in the OP.
>> Anonymous
OP here. facepalm.jpg to myself.

I just checked the EXIF of the picture I posted:
"Focal Length (35mm Equiv) 82 mm"
"Focal Length 55.00 mm"

Means, although my (only for digital) DX lens has 55mm on it, this means it's WITHOUT the cropfactor.
Result: The writings on the lens do always apply to 35mm film cameras and you have to know yourself what your sensor does with the picture.

Wow, means I've been shooting small Tele all along.
What a twist!
But what the hell is this DX-Bullshit for? Right now it seems like there is no real difference between film and digital lens except I can't use the DX on film cameras.

Still, thank you for the answers, I was really surprised, only once sage'd!

>>178227
Just a guy passing by. Recently I always have to up people into my shots. I don't know, maybe I'm just not used to achitecture alone...
>> Anonymous
>>178598
>But what the hell is this DX-Bullshit for? Right now it seems like there is no real difference between film and digital lens except I can't use the DX on film cameras.


1. Lower cost, for you and for Nikon.
2. Smaller, lighter.
3. It doesn't really matter unless you pick up a film F-mount camera or a D3.
>> Anonymous
>>178598The writings on the lens do always apply to 35mm film cameras and you have to know yourself what your sensor does with the picture.

lulz, see:

>>178207on a crop camera, you HAVE to apply crop factor

>> Right now it seems like there is no real difference between film and digital lens

see picture in>>178338

smaller image circle
>> Anonymous
>>178603
Ok:
>> Right now it seems like there is no real difference between film and digital lens for DSLR users.
fix'd
except for what>>178602said
>> Anonymous
Everyone should remember that field of view is measured in degrees, and focal length (in mm) is a completely different concept. If you stop thinking of a certain point of view as "a 75mm equivalent", and think of it instead as "the view that a 75mm lens gives on 35mm film", it's so much easier to understand.