CROP SENSOR - I don't get it (Page 8): Exactly. When I had a Pentax 6x7 (6x7 cm) film camera I never gave any thought to "crop factors". I meant nothing. I still have a couple Large...

lamiaceae Loc: San Luis Obispo County, CA

BebuLamar wrote:

I think it's best to forget about crop factor. br... (show quote)

Exactly. When I had a Pentax 6x7 (6x7 cm) film camera I never gave any thought to "crop factors". I meant nothing. I still have a couple Large Format 4x5" View type cameras, again "crop factors" have nothing to do with using them or the lenses I have for the, I just know what each lens does for me as I do Medium Format (6x6 or 6x7) cameras and my 35mm film cameras. I don't own a FF digital camera only a few APS-C Pentax and Fuji digital cameras. Pentax, Nikon, and Sony DSLRs have 1.52x or 1.54x factors and Canon has 1.6x as their sensors are very slightly smaller APS-C sensors. FF cameras are not though of as having crop factors since their sensor is the same size as a film camera 24x36mm film frame.

You should think of crop factors as factors for angles of view not magnification as that is more correct and less confusing. But it is best to ignore crop factors altogether, just learn what each focal length lens does on the camera(s) you actually have.

Jimbo1947

BebuLamar wrote:

But to do that you must use full frame lenses. If you use lenses designed for the format then there is no cropping. Of course the results are the same.

Not so. You still have to consider the focal length multiplier even on crop sensor lenses. Wether you shoot with a lense designed for full frame sensor or crop sensor, the effective focal length will still be 1.5x more when used on a crop sensor camera. A 50mm DX lens designed for a APS-C sensor camera will have the framing of a 75mm lens.

DeanS Loc: Capital City area of North Carolina

Forget all this “stuff”, grab a lens, mount it to your camera, shoot what you see. If the image is not large enough, zoom in, if still not large enough, get a longer lens, if still not large enough, get closer, if STILL not large enough, crop the damn thing. Problem solved.

Bipod

rmorrison1116 wrote:

Seriously?! You truly believe they are trying to be deceptive?! Then why is the weight or quantity clearly printed on every label or box or container.

You seriously believe that concave bottoms and slack-fill packages are accidental?
Or they just do it for the heck of it?

Sure, in tiny print is says NET WT 684 G. I'm sure you always read that,
and you remember tha tit use to say NET WT 759 G

That's there only because it's required by law.

Package downsizing is deliberate and so is the attempt to make the package look
larger than it is. There are consultants who specialize in advising food manufactuers
on packaging.

BebuLamar

Jimbo1947 wrote:

Not so. You still have to consider the focal length multiplier even on crop sensor lenses. Wether you shoot with a lense designed for full frame sensor or crop sensor, the effective focal length will still be 1.5x more when used on a crop sensor camera. A 50mm DX lens designed for a APS-C sensor camera will have the framing of a 75mm lens.

What is the effective focal length? What is the framing of a 50m lens or 75m lens? The only reason you can call something crop is that the lens produces and image circle significantly larger than needed to cover the sensor. Otherwise there is nothing to crop.

The Can Man Loc: Big Arm, Montana

BebuLamar is probably by far the smartest of us all. Kiss (keep it simple stupid) is really the important part. Don’t let the thoughts of FF wndcrop sensors get in the way. Other words don’t think to much. Go shoot.

RichardSM Loc: Back in Texas

Bipod wrote:

You seriously believe that concave bottoms and sla... (show quote)

What the heck are you all talking about? This about crop sensors.

Longshadow Loc: Audubon, PA, United States

The Can Man wrote:

BebuLamar is probably by far the smartest of us all. Kiss (keep it simple stupid) is really the important part. Don’t let the thoughts of FF wndcrop sensors get in the way. Other words don’t think to much. Go shoot.

Retina Loc: Near Charleston,SC

If there was not such a legacy of 35mm film camera usage, the terms Crop Factor or Full Frame equivalency would obviously not be around. Instead, some might keep a little chart of sensor size vs focal length for equivalent fields of view for each sensor size. Most people, if not everyone, would just get used to what various focal length lenses did on whatever camera we were using at the time.

Longshadow Loc: Audubon, PA, United States

Retina wrote:

If there was not such a legacy of 35mm film camera usage, the terms Crop Factor or Full Frame equivalency would obviously not be around. Instead, some might keep a little chart of sensor size vs focal length for equivalent fields of view for each sensor size. Most people, if not everyone, would just get used to what various focal length lenses did on whatever camera we were using at the time.

It would just be "This is what the camera takes.".

cjc2 Loc: Hellertown PA

Retina wrote:

If there was not such a legacy of 35mm film camera usage, the terms Crop Factor or Full Frame equivalency would obviously not be around. Instead, some might keep a little chart of sensor size vs focal length for equivalent fields of view for each sensor size. Most people, if not everyone, would just get used to what various focal length lenses did on whatever camera we were using at the time.

Perhaps. My personal Mamiya 6 x 4.5 lenses were all marked for 35mm equivalent. It helped me choose the right lens without having to do the math each time. Worked for me!

Retina Loc: Near Charleston,SC

cjc2 wrote:

Perhaps. My personal Mamiya 6 x 4.5 lenses were all marked for 35mm equivalent. It helped me choose the right lens without having to do the math each time. Worked for me!

I agree it can be handy, like a little piece of the chart right on each lens. Of my cameras used a 90mm for wide angle. That's when I decided to think of my Nikon as a totally different instrument and just learn the lenses. It didn't take too long to get used to what lens to use in a particular situation.

donrosshill Loc: Delaware & Florida

A good explanation. Thanks
I make it simple. I put on a lens, I focus, compose and if I can see what I want I shoot. It works.
Don

SuperflyTNT Loc: Manassas VA

BebuLamar wrote:

What is the effective focal length? What is the framing of a 50m lens or 75m lens? The only reason you can call something crop is that the lens produces and image circle significantly larger than needed to cover the sensor. Otherwise there is nothing to crop.

I ignored this the first time you said it but now I have to chime in. You’re totally wrong. “Crop sensor” is totally about the sensor size, cropped from a FF sensor. It has nothing to do with the focal length. A picture taken on an APS-C camera with a lens made for a FF camera will give you the same image as one made for the crop sensor of the same focal length. It’s still called a crop sensor no matter what lens you use.

BebuLamar

SuperflyTNT wrote:

I ignored this the first time you said it but now I have to chime in. You’re totally wrong. “Crop sensor” is totally about the sensor size, cropped from a FF sensor. It has nothing to do with the focal length. A picture taken on an APS-C camera with a lens made for a FF camera will give you the same image as one made for the crop sensor of the same focal length. It’s still called a crop sensor no matter what lens you use.

If you use the lens designed for APS-C which are Canon EF-S, Nikon DX etc.. the image circle these lenses produce only just enough for the APS-C sensor and no more so what is there to crop?