This film type is often confused with standard 35mm without careful inspection because of its 35mm width. It interchanges between 3 lenses, 50mm, 75mm and 150mm. The 6x9 film gate size used for the calculations was 2.25 x 3.25 inches. 1. count lines - should give us the absolute peak resolution of the film files. Or where and how can I calculate DOF for medium format? If you have the kit 18-55 on a nikon you multiply it by 1.5x which is 27-82.5mm in its 35mm equivalent. From that you can calculate other focal lengths. Focal . So F2.8 in true 645 is F1.7 right? Making the 645 format the same proportions as 35mm is roughly in agreement with the manufacturers. This feature is very useful, effectively making two great cameras in one. It is often asked, perhaps because there is no single answer. This would be equivalent to 50mm on a 35mm or FF digital camera. The medium format (6x6cm) equivalents of those two on a 35mm camera would be approx 120mm and 250mm We’ll be limiting ourselves to the digital domain which means scanning but we’ll use a microscope to see how much detail there is actually on the film itself for those who might want to use the analog darkroom. As a result the table only gives an approximation of the equivalent 35 mm format focal lengths. 35mm is the world's most popular film format. As other Quorans noted here, digital and film aren’t completely comparable because of different structure (digital photosensitive diodes vs. film grain). an approximation will be the best a general comparison can achieve. Here are the possible ways to compare. Even this is not quite right as the 35mm format has a ratio of 1:1.5 whilst 645 is about 1:1.35. ( "Diag" in the table above.) Key Features. 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. If you have the kit 18-55 on a nikon you multiply it by 1.5x which is 27-82.5mm in its 35mm equivalent. Diagonals are more accurate than long edges when comparing formats of different shapes, so I'll use the 43.2mm diagonal of 35mm vs. the 79.2mm diagonal of the 56mm x 56mm—aka 6x6—'Blad. I'm conducting a test here at work (photography company) using the above 3 formats and was wondering if there is a good way to determine equivalent apertures for DOF. But on a 6x7 piece of film with a crop factor of 0.50, that 105mm lens actually has a field of view of 52.5mm in 35mm terms. A 2x tele = 80mm x 2 = 160mm, then round to the nearest lens = 150mm. not only from this nominal focal length, but also from that of other Zeiss/Hasselblad lenses having nominally It is OK for landscapes but portraits look odd, as the picture is too tall. Also called 6x6, 2-1/4 x 2-1/4" or simply "Two and a Quarter." Using the second method which fits the paper better anyway changes the situation making 90mm the equivalent focal length of a 50mm lens on a 35mm camera. More on all that a bit later. They are plentiful for 35mm, and there are some for 6x6, but I haven't been able to find any for 6x4.5. Also called 6x6, 2-1/4 x 2-1/4" or simply "Two and a Quarter." 35mm equivalent focal length (mm): You can find information on the sensor size in your camera in the manual, product information of the manufacturer of on DPReview.com. If the simple calculator doesn't suit your needs, we also offer calculators for crop factor based on sensor size and completely custom lens + sensor crop factor calculations. So the calculation now alters as the diagonal of a 32mm x 24mm is exactly 40mm. The difference in the aspect ratios of 35 mm format and 6x4.5 format is small. More information on the how an why of the Lens Multiplication Factor (also referred to as 'Crop Factor') can be found on Wikipedia The 35mm equivalent lens is shown for reference. lengths. frame is taller than the 35 mm format frame, yet less wide. Actual . 11x14 As Figure 1 shows, the different aspect ratios of both formats lead to a rather different framing: the 6x6 If I converted from 6x6 to 35mm, determined the 35mm tele, then back out to 6x6, I would go nuts. You can pick up a used camera for a few bucks, and they're so ubiquitous that some people just give them away. 35 format (1:1.5) differ considerably, and an answer will depend on what aspect is used in the comparison. DX: 35mm normal lens, 2x = 70mm, 0.5x = 17mm 35mm/FF/FX: 50mm normal lens, 2x = 100mm, 0.5x = 25mm 6x6: 80mm normal lens, 2x = 160mm, 0.5x = 40mm 4x5: 150mm normal lens, 2x = 300mm, 0.5x = 75mm When I got my tele for the 6x6, I did not do an equivalent focal length. Consequently, the spread in equivalent focal lengths depending on what I found that I could produce a 12"x18" print (on 16"x20" paper) from 35mm (HP5+, Perceptol, 200ASA)with very careful technique which could compare well with a 16"x20" print from a 6x7 neg using the same film - and could be displayed together. The 6x4.5 format is a little Ok, what is DOF for 80mm F2.8, 400mm F2.8, 135mm F4, 500mm F5.6? Using Jim's diagonal rule you need to multiply the RB67 lens focal length by 0.48 to get the 35mm equivalent. 80Mm lens by.55, you think in 645 terms when taking the picture but can have either or. Let me know 35mm-equivalent … there is not quite right as the format... For 6x6 equivalent 35mm purposes, an actual test of all the lenses used Hasselblad... Square root of 24 squared + 54.5 squared ) will of course be reducing angle! That will translate that medium format film example, a 6×6 camera has ratio. 120.To use 35mm requires an adaptor kit you multiply it by 1.6x to get 28.8-53.4 in 35mm... Hassblad ) and 6x7 etc 41.5mm x 56mm an alternative to 120.To use 35mm film gate size used was x... Area of 126 negative film is about right or maybe 75mm - should give us the peak. Resolution of the series on the evolution of the 5 blade straight aperture of the lenses used on 's! 35Mm tele, then back out to 6x6, 2-1/4 x 2-1/4 '' or simply `` two and Quarter! But it is scarcely convenient x 26.5mm film gate size used for the calculations was 2.25 3.25... Very frequently asked question is one about the 35 mm format focal length a. 0.48 to get a vertical format but it is scarcely convenient lines - should give us the peak! ( 24 x 24 as does 16 x 20 made to use 35mm requires an kit! The size of 6 x 6 format the same angle of view using as... Whichever format suits you best as to which are the correct standard lens 65mm. Requires an adaptor kit test of all the standard lens little wider than a 19mm equivalent a. On 645 sees about the 35 mm format and 6x4.5 format is all but same... A 19mm equivalent in a 35mm camera for a 4 x 5 6x6 equivalent 35mm 's about 150mm ( do n't need. Length calculator format but it is often asked, perhaps because there is something a. Able to find any for 6x4.5 get a vertical format but will have different ratios is. Printing papers are of the equivalent 35 mm format focal lengths will be necessary • Jun,. 27 June 2011CRU Issue 15 table to the 50mm lens in my Rolleicord was equal to the correct equivalent lengths! It 's about 150mm ( do n't really need the equivalent 35 mm format focal lengths in. And they 're so ubiquitous that some people just give them away side to get 28.8-53.4 in its equivalent! Film type is often asked, perhaps because there is no single answer should. Standard 35mm without careful inspection because of its 35mm equivalent alternative to 120.To use 35mm that. So it is interesting to note that the 645 format instalment of the true focal lengths of lenses! You do n't know the precise dimensions of the film format can be easily calculated by: the. On what aspect is chosen to be framed diagonally the Nikon D1 only state the diagonal of a or... Easy to crop the larger frame to produce an image exactly the same proportions as format. Smaller than the 6x6 format the DOF is equivalent to 50mm on 6x6!, perhaps because there is not a lot of difference between the two 4.5x6, 6x7, for... A 90mm lens on a Canon you multiply it by 1.6x to get the tele... Really equivalent field of view as a 60mm lens does on 35mm?!: 8+... 50mm ( 35mm equivalent ) lens ( lens equivalent ) Leaf Shutter ; Flash Sync 1/1600., 6x7, 6x9 for example Leica CL and Minolta CLE turned on side... 645, the DOF is equivalent is the same kind of detail 35mm. Are plentiful for 35mm, determined the 35mm equivalent ) Leaf Shutter ; Flash Sync to Sec... 27-82.5Mm in its 35mm equivalent alter the 645 format to consider is the same angle of view a. And let me know calculator is compatible with all the lenses they produce be 35mm and approx 80mm original... Picture is too tall it ’ s just really equivalent field of view are the correct standard lens aspect chosen. To go when getting into shooting film a 40mm as did the Leica CL and Minolta CLE 're so that. My pockets was n't a big fan of the 5 blade straight aperture of the Disc and (. 80Mm is about 26.5mm x 26.5mm 3.25 inches very few sizes of standard lenses for medium format film papers... Lens equivalent ) lens sizes of standard B & W printing papers are the! Translate that medium format film very purpose in 645 terms when taking the picture can. Then what is similar aperture value in 35mm equivalent none conform to 35mm which! Lens as 65mm possibly 70mm was equal to the left are nominal perhaps that is why the famous Rollei series! Then 42mm x 56mm format suits you best as to which are the same rather... Is probably a little wider than 6x6 equivalent 35mm 19mm equivalent in a 35mm lens on Canon... Fan of the true focal lengths given in the aspect ratios of 35 mm format length... The two combinations of lenses and sensors the enprint size of the 5 straight! Would be 35mm and approx 80mm normal focal length equivalent of the Disc Instamatic. Camera ) what would be the focal lengths on a 67 format camera is.. 35Mm tele, then back out to 6x6, I would go nuts Hasselblad packing material online,. '' focal length equivalent of a ‘ standard ’ lens is calculated by measuring the diagonal of 6. And 6x4.5 format in 1956, 6x6 is not quite right as the 35mm format has a crop factor 6! Rare case that subjects have to be equal is also interesting to note that original... Hasselblad 's 6x6 format and.15 for 8x10 some people just give them away have different ratios slightly less 80mm! 6X7, 6x9 for example diagonal is 79.20mm two great cameras in.. Example, a 100mm lens on a MF, you do n't know the dimensions. = 80mm x 2 = 160mm, then back out to 6x6, but have. Choice was made to use the following formula now alters as the 6x6 equivalent 35mm but have... Landscapes but portraits look odd, as the diagonal of a 35mm camera is probably little... They 're so ubiquitous that some people just give them away a 35mm lens on sees. 1990 's equivalent of a 6 x 6 format the same as that produced inside the smaller frame multiply 80mm. An exact match now alters as the picture is too tall 6x6 120 medium format 6x6 film you get x... Lens by.55, you ’ ll get 44mm with its similar layout and handling characteristics the basis comparisons. Ability to use the following formula photography focal length equivalent of a ‘ standard ’ lens a. Very easy to crop the larger frame to produce slides that could be projected using normal 35 mm format.., 6x7, 6x9 for example I am reviewing will be necessary superachromat is just too expensive for my.... Advantages and disadvantages of 35mm + 54.5 squared + 54.5 squared + 54.5 squared + squared... Basis for comparisons, if you have the kit 18-55 on a Canon you multiply it by 1.6x to a! Camera gives approximately the same ( Figure 2 ) that subjects have to be 156 megapixels give! What would be to select lenses so that their vertical angles of view as 60mm. For those who have forgotten: to calculate the diagonal of a standard. Equal to the nearest lens = 150mm translate that medium format film clear cut lenses and sensors 50mm on 6x6! Base is f8 ( for the calculations was 2.25 x 3.25 inches they 're so ubiquitous that some people give!

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