I didn't quite understand why there is a smaller DOF with MF vs 35mm. ages ago We comp... Has anyone here bought a MF camera on ebay from japan? It has do to with the degree of enlargement. Night and Low-Light Photography Workshop, Alan Hess, 2011 (permalink), For the same Focal length, and aperture, you will have a greater DOF in MF.. is this right? For film size 2cm by 2cm you need a hole that lets in four times as much light to get the same amount of light onto the film as you did to get "f2.8" on the 1x1cm film. Saying that in simpler words, the medium format provides great creativity such as what should be in focus and what should be … I did a blog post a while back which goes into some more detail. ages ago Originally posted ages ago. The size of the COC is also based on what is accepted in the photo industry. 4X5--Near focus 7.85ft, Far focus 13.79ft, DOF=5.94ft. (permalink). Although a 50mm lens on a 35mm format camera and an 80mm lens on a Medium format camera give you a similar field of view, they will not give you the same DOF for a given aperture. We promise to keep your personal information secure and use it for 35mm Developed in the 1920s by Oskar Barnack, 35mm is still one of the world’s most popular film formats. If the same image is taken with two different format cameras, say a 35mm camera and a medium format camera, at the same subject distance, the same f-stop, with the same focal length lens  and the resulting images are printed  to the same size, the medium format image will have greater apparent DOF. (permalink) (VOXphoto - Apologies in advance if I have erred in my suggested edit to your conclusion.) To get the same depth of field on a 120 6x6 frame you will need to shoot at 3.6x times that - which would be 180mm at f/11 and will only contact you regarding information you have asked for. It will also give you a different viewing angle but that is not the point. Comparing at same framing (hence not the same distance?? This is why 300mm prime lenses that go down to 2.8 cost a fortune, the glass has to be huge. (permalink), I'll throw in my 2 cents. to this website. Which is direct response to the original question. Anyone like making slideshows on Youtube? Someone said that for the same angle of view and F-stop, medium format has narrower depth of field. "When f/stop, distance, and lens field-of-view are all held constant, the longer the focal length, the shallower the depth of field." 35mm film has a standardized frame size of 24mm x 36mm (864 sq. Depth of Field and Medium format cameras. The focal point of a lens is in fact a focal plane, a flat 2 dimensional field out in front of the lens where everything is actually and truly sharp (assuming a good quality lens), that is, a point in our subject focuses to a point on our film or sensor. Depth of field refers to the section of a photograph that appears to be in sharp focus. I expected the Hasselblad would win but I thought it wouldn’t be as far ahead in … It manages to avoid many of the issues of distortion that accompany wider options and can still create images with shallow depth of field. 35mm format View all photographs taken by EMULSIVE on 35mm format film. Comments? So let's say you take a shot on your 135 with a normal 50mm lens at an aperture of f/2.8 (permalink), @edscoble, okay what you were saying wasnt wrong, but you are not answering the question. And my explanation is correct, It just was not taking in the factor of CoC. In re-reading this thread a few times only 'luisclub' and I trying to answer the OP question. that's aperture, which I assumed you understand. 120 (or 220…) film photography. you are correct though if you wanted the same field of view with the formats the larger would have to be closer which would reduce the dof which I said in my post earlier. ages ago Of course, > one can also learn the same thing by experience. SAME focal lenght, SAME aperture, SAME distance. Medium format: at 110mm, f/2, 3 feet, total DOF is 0.04 ft Originally posted ages ago. For the same f-number, the image made with the 35 mm camera would have four times the DOF of the image made with the 4×5 camera. On a little P&S digi-cam (small sensor) F2.8 lens is about as big as the end of your middle finger. Lenses produced for 35 mm film cameras may mount well on the digital bodies, but the larger image circle of the 35 mm system lens allows unwanted light into the camera body, and the smaller size of the image sensor compared to 35 mm film format results in cropping of the image. I answered the OP--he never asked about FOV. ages ago It's like a Big Mac is two patties, special sauce, lettuce, cheese on a sesame seed bun. A 35mm camera has a film area (or sensor) of 36mm x 24mm, whereas a medium format camera has a much larger area of film or sensor, usually between 60mm x 45mm to 60mm x 70mm. ages ago of course if you keep the same lens and just crop, it will be the same dof. Now I will prove what you found with the same way I proved my point. Medium format has traditionally referred to a film format in still photography and the related cameras and equipment that use film. the oibject nearer you and the object further away? By the way the term "circle of confusion" is a sort of grandiose way of saying "how big can the blur get on the negative before it becomes noticeable?" This means that a photo taken with a 50mm lens at f/1.8 from the same distance will not have the same depth of field when taken with a 35mm camera and 4x5 field camera. 35mm--Near focus 9.32ft, Far focus 19.79ft, DOF=1.47ft ages ago Ability to change slider value by clicking on its track. In both cases the 35mm film won't touch the DOF of the larger formats in the final print. It has a DOF calculator and a bunch of others. Composition wise if you wanted to fill the frame of your subject in both formats one the larger format would have to be closer at the same focal length to have the same composition and that fact you are closer means the depth of field will be shallower since you have to focus closer. Our natural vision may be more closely aligned with the 50mm, but I think that's why the 35mm is a much better pick. But when people talk about depth of field and the CoC for different formats they are assuming a print of some kind will be the final product. MJM67 edited this topic ages ago. Just because a camera shoots medium format film does not mean that the lens is automatically larger. Take a 80mm lens on 35mm and MF. 110/220 is really a format produced for the Brownie No.2, which was an amateur camera. Hope that helped a little. My point and shoot camera has a zoom lens that they have very kindly converted to 35mm speak as 28-112mm, which is about what it looks like on the screen at the back. An 80mm lens is an 80mm lens  whichever camera its on, the focal length at infinity is 80mm and its DOF is a constant factor of the f-stop used. I think the difference is due to the actual diameter of opening in the iris. Conclusion 6x4.5 versus digi point & shoot. ages ago As a model, lets say f2.8 for a film size of 1cm by 1cm you need a hole 1cm in diameter. With those variable all equal the larger format will have a larger DOF. It gives a very wide field of view, and a 105mm is considered a wide angle lens on this format camera. (permalink). Now that incorrect DOF calculator. So effectively, the same focal length lens can be a telephoto with one format, but a wide angle in another, as illustrated in the example below. brichoz edited this topic ages ago. Good day may you learn something new everyday!! Larger film/sensor requires a longer focal length to produce the equivalent FoV (compared to a smaller film/sensor size). But the upshot is that depth of field aside, medium format images simply appear to have better separation of planes – even if shooting relatively stopped down at f8 or so. Originally posted at 7:25AM, 28 August 2008 PST In > fact, one can estimate pretty closely just how much less. PS: i know i mentioned digital. and i do enlarge my prints lol, the old fashion way on an enlarger, easel, and silver gelatin fb paper, and hopefully soon will be platinum prints on archival cotton rag. This Depth of Field, also known as the range of acceptable sharpness,  is effected by 5 primary factors…. Sounds like you don't actually print your images. ages ago What I was suggesting is a reason why a physically smaller lens (with smaller coverage) would have greater DoF than a physically larger lens that has to cover a larger film format - setting aside relative focal lengths, angles of view and image size on film. (permalink) Thanks for helping me help you! circle of confusion is real part of optics. Good shootin to all and may all your shots be good ;) Should you feel we have not adhered to these principles, please feel free to contact us any time The reason that the 80mm has a different field of view in each camera, from the same position is because the negatives are different sizes. Let’s take an example. (permalink). and as for my examples idk what to say, i guess my logic and experiments will have to be posted some time soon. (I'm sure on the theory but my math is a little stale so I may be off a little bit on the exact numbers.) I read an article (french photo mag "réponses photo") comparing the Ricoh GRii and the Sigma Dp1. Originally posted ages ago. Medium format View all photographs taken by EMULSIVE on 120 format film – 6×6, 6×7, 6×9, 6×12 and 6×17. drewleavy edited this topic ages ago. “Medium Format” is anything larger than 35mm but smaller than 4×5. At any given aperture, a smaller sensor will yield deeper depth of field than a larger sensor, just as a piece of 35mm film yields deeper depth of field than medium format. Cropped medium format sensors include sensors for Pentax and Fujifilm medium format cameras as well as the Hasselblad X1D. MJM67 asked Why don't you do some test Images and website content ©Adam Monk 2020. Find one that will teach DOF relating to format size and that DOF is somewhat subjective. So standing in the same position, a photo shot with an 80mm lens on 35mm film will have less depth of field than one shot with an 80mm lens on medium format for any given aperture, because you are enlarging the film more to reach a given print size. Depth of Field (DOF) confuses many people, especially in relation to medium format cameras Vs 35mm format cameras. If you know that 50mm is “normal” and that, say, 90mm is a “portrait” field of view in the 35mm (Film/DSLR) world, then what you need to know is these focal lengths yield different fields of view in the medium format world. 35mm format: (equivalent field of view is 72mm), f/2, 3 feet, total DOF is 0.06 ft. ... which means MF wide angle has same DoF as a 135 film format tele lens, and we know that's kind of thin ... hence for same angle of view, MF has less ( thinner ) DoF than 135 format. The answer is > that for the same angle of view, same size final image, and same f stop, > you have less depth of field with medium format than with 35 mm. The shorter the focal length the smaller the aperture can be and still achieve the desired f/stop. 50 mm lens closed to 5.6 and focused at 10 meters will always have the same DoF no matter if it is MF, LF or 35mm camera What I was suggesting is a reason why a physically smaller lens (with smaller coverage) would have greater DoF than a physically larger lens that has to cover a larger film format - setting aside relative focal lengths, angles of view and image size on film. (permalink), Sure on the film itself, of course. ages ago Personally, I like this because it means I can have my subject in sharp focus, a clearly identifiable background, but still have obvious separation between the two. You will find that given the same field of view, focused at the same distance, and same F-stop the smaller format will have a greater DOF. Benji > difference between 35mm and medium format in this regard. Is it because the film is bigger? I think this is what most people are talking when they talk about medium format having less depth of field, not comparisons using the same focal length and attempting to achieve the same framing on different formats. Its an easy mistake to make, to assume because your angle of view looks the same, your DOF will be the same too… But DOF is dependent on Focal length, not field of view, so the 80 mm lens on the medium format in fact has the same DOF as an 80mm lens on 35mm format (for the same aperture). (permalink), the point is , if you take a 150mm lens made for 4x5 , and a 150mm made for 35mm , chances are that you won't get the same DOF because of the circle of confusion standard. ages ago This is a real example, its actually what you would get if you stood in the same place with the two cameras and took the same shot on both with the 105mm lens… Or, you could simply take it on the 6×17 camera, develop the film, and take a pair of scissors and cut out a 24x36mm rectangle, and get exactly the same result. thats not what B3ngi was talking about. I’ve shot 5 rolls of 120 film, and so far only 2 have come out fine. I calculated equivalent FOV roughly from this table. (permalink), For Free!! Originally posted ages ago. (permalink), Thanks for your input guys.. As for what i actually ment originally, it wasn't really clear in my mind either.. i guess i was troubled by the fact that with a bigger negative format, you will have a smaller DoF. (permalink), Matt, you left the pickles and onions off of your Big Mac. Matthew-- ages ago same fstop, same focal length, same distance away from subject, and same focal point. Voxphoto But distilling the medium format look down to depth of field is just silly, and it doesn't reflect the true reasons that the format exists as an option for photographers.
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