So for example, the spec for your digi cam might be 'equivelent of 30mm to mm' just an example That means that the magnification or view A typical entry level digital SLR has a factor of 1. The typical point and shoot fully zoomed out is roughly equivalent to 35mm, so mm would be 8.
Also keep in mind that most DSLR's have a inherit 1. You must log in or register to reply here. A nice long list of photography related questions. Most reactions Similar threads. Replies 10 Views Jul 11, Samanax. Got my "free" lens :. Replies 8 Views Jul 20, --ares Just wondering about this Lens???? Don't be a stranger - register now and start posting!
Oct 29, 1 hi guys i am buying a lense for my rebel xt. Oct 29, 2 I didn't think it worked this way for camera's with interchangeable lenses, you have no start point. More info. Oct 29, 3 amastro wrote in post hi guys i am buying a lense for my rebel xt.
Oct 29, 4 only 4x? Oct 29, 5 yes i am have a yashica point and shoot digital camera f5. Oct 29, 7 amastro wrote in post hi guys i am buying a lense for my rebel xt. Oct 29, 8 amastro wrote in post only 4x? Oct 29, 10 guys i dont understand what u are saying. Oct 29, 12 amastro wrote in post yes i am have a yashica point and shoot digital camera f5. This site by Canon may help you hi bro the zoom is ok but will it be the same on the crop sensor?
Oct 29, 14 hi guys i want to know that is there 2x convertor for canon lense? If you have the kit lens then you have a mm lens which is equivalent to a mm once you apply the 1. Basically, once you get into the SLR world you have to forget about the X in the zoom since it doesn't tell you how big the image will be. You have to convert yourself into focal length. Correct me if I am wrong, but the 50mm which I agree is the normal lens for 35mm or mm film.
But, it is not what the human eye sees, it is rather what the eyeof the camera sees if you want to put it that way. As I do not know what my exact field of view is, I could not tell you what lens would correspond to that on a 35mm camera. However, I know it is wider than what I see when looking through a 50mm lens on a 35mm camera -- it is probably closer to a 24mm lens.
I can say this because when I am doing interior shots my 18mm lens on a 1. Granted, a 50mm is probably falls within the range to which I would see the most detail. Some people do use this, but it's incorrect, and leads to more confusion than clarity. In particular, it'll lead to a situation where "6x zoom" means two entirely different things.
Camera manufacturers use "times zoom" for compact cameras, and they invariably mean zoom ratio. If you start using "times zoom" as a stand-in for "times some arbitrary 1x magnification," you'll confuse everybody.
Enter the focal length of the lens you have an interest in, press the little right arrow button, and it will make the equivilent calculations for you.
I believe the premise is that a 50mm lens on 35mm format , when viewed through a 1x viewfinder, provides the same size image as viewed with the naked eye.
This is not to say that the lens will have the same field of view as the naked eye, but the size of the image objects will be the same or very similar. This is easy to test by looking through a SLR viewfinder 50mm lens mounted with both eyes open.
The size of the subject in the viewfinder should be very close to the size of the object in your other eye. The field of view is much less than the eye or even a film cam , but the image size is the same. As Petteri and others have said, you are trying to use the term zoom to describe the magnfication of a lens relative to the human eye. This is not correct. Per Petteri, the term zoom refers to the ratio of the shortest focal length to its longest focal length, of a "zoom" variable magnification lens.
This 10x in no way refers to the absolute magnification of the lens, only the range from the minimum focal length, 30mm, to its maximum, mm. Per Bob, who discusses magnification, a 50mm lens is often considered to have a similar image scale to the human eye. As stated, in determining the magnification factor of a lens, you divide its focal length by 50mm.
In this case, your mm lens would have a magnification of 6 6x. Regardless of whether you have a zoom type lens or a fixed telephoto lens, at mm focal length the magnification factor is approximately 6. This is the very best statement I have ever seen made when it comes to this type of "argument" over zoom, x, 50mm, human eye, etc. You have stated so well, exactly the same as I feel. And I have been slammed, by the tech types, for making such statements before.
Rick, in my opinion, your statement below should be the definitive answer when a newbie asks this type of question. Good for you Rick! The problem with this metric is that it assumes 50 mm as the "1x" factor. This, in turn, assumes that you're shooting with 35 mm film -- and even so, the definition is highly debatable. The "x notation" only makes sense for zoom ratio. For macro, we can unambiguously talk about magnification, but the convention is to use ratio notation for that -- , , , and so on.
On an APS sensor the mm lens is roughly Your previous points are well made and clearly stated: they also bring much needed clarity to this "x times" confusion. The whole idea that a 50mm lens on full frame, or any lens where f-length equals image diagonal is somehow "equal" to the field of view of the human eye is, well, ridiculous. Indeed, this idea is so wrong it merely adds to the confusion. The standard lens does not equal the field of view of human vision.
The standard lens is merely the lens which falls midway between extreme tele, and extreme wide angle lenses, respectively. The human eye sees in an entirely different way. No way is it an 'average' between them. Let me explain further, because the mechanics of vision is very sophisticated compared with a camera lens's simple view The wide-field view is very fuzzy all over, with hardly any detail at all, but it is very sensitive to movement, especially at the periphery.
The narrow angle tele component, on the other hand, is extremely sharp, and it is this sharp detailed 'lens' which is scanned around WITHIN the fuzzy wide angle view. If you want to fit more into your frame, you might want to look into wide-angle focal lengths: 14mm, 20mm, 24mm, 28mm, and 35mm. On the other hand, if you want to get as close as possible to your subject, go for a telephoto lens with focal lengths that usually range from 50 to mm. As a beginner, the best first lens to buy is the kit lens for your camera.
For many entry-level cameras, this lens would be the mm lens. With a moderate zoom range and an affordable price tag, the kit lens is by far the most versatile for anyone just getting starting in photography. The ideal combination of lenses for landscape photography is usually a wide-angle lens, standard zoom lens and a telephoto lens.
These will usually cover focal lengths all the way from 16mm to mm. The aspherical element makes it compact and helps obtain high-contrast images.
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