200mm. 300mm. 300mm. 450mm. Dx to Fx Lens Conversion Chart. Related reading: APS-C sensor to full frame equivalent calculator. For example, if you look at a 135mm on the DX column you can see that the focal length will be equivalent to 202.5mm instead. As another example, if you look at 18mm in DX format, it is equivalent to 27mm in FX format. Alternatively, the imminent 28-70mmF2.8 provides similar range, DOF and light-gathering with a weight of only 470g if you don’t need the mechanical focussing. I don't think the 28-70 f/2.8 is a suitable replacement for the 18-35 f/1.8 for several reasons: 28mm FF at APS-C crop factor is 42mm, while 18mm APS-C is 27mm. The APS-C CoC of 0.02 produces a depth of field of 16.19″. The APS-C image with the same lens has a shallower depth of field, weird right? A 50mm APS-C lens will have a cropped field of view of 75mm. If you compare a full-frame 24-megapixel sensor to a 24-megapixel APS-C camera shooting the same image at the same distance. If the adaptor is a good one no characteristics of the lens will change. The lens will be placed in exactly the correct spot it should be, and all will be functioning as normal. Some mounts however don't have an easy conversion with optics correcting focal shift. If those optics aren't included, then the converter will act like an extension One swallow does not a summer make, said Aristotle, suggesting the dangers of looking for trends based on single examples. Even with this in mind, I'm pleased to see two manufacturers introduce 70-200mm equivalent zooms for APS-C cameras at this year's Photokina. First Fujifilm introduced its 50-140mm F2.8 R, and then Samsung followed suit with its 50-150mm F2.8 S. I think these lenses make Since the a7III still sports a 24mp sensor, the crop would still be a 10mp image. And, of course, the menu allows for this to happen automatically when an APS-C lens is attached or only when you choose to shoot in this mode. If you choose to shoot in full frame mode with an APS-C lens, then you will need to crop out the vignette in post. PENTAX LENS FOCAL LENGTH CONVERSION CHART Full-frame >APS-C size. Using 1.5 crop factor. 6mm > 9mm / 38mm > 57mm / 70mm > 105mm 8mm > 12mm / 40mm > 60mm / 72mm > 108mm 10mm > 15mm / 42mm > 63mm / 74mm > 111mm 12mm > 18mm / 44mm > 66mm / 75mm > 112.5mm 14mm > 21mm / 46mm > 69mm / 76mm > 114mm 15mm > 22.5mm / 48mm > 72mm / 78mm > 117mm Lens focal length conversion table of 135 / 35mm small format cameras, medium formats, 6x6, 645, 6x7, and APS-C format. Lenses from 15mm to 135mm with angle of views, ultra-wide angle lenses to telephoto lenses. Focal length conversion for medium format image sensors of 44x33, 48x36mm. Converted values are matched with availability of lenses .

full frame to aps c lens conversion