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Some should be able to help........

As the safe shutter speed is 1/60 for a standard 50mm lens on a 35mm film is it the same on a DSLR or should it be 1/90?

Or is it the same

Thanks in advance

Short answer is yes, you should take the 1.5X crop factor into account. That having been said, it's only a rough rule, and with good technique you can push the boundaries anyway, so 1/60 is also very possible.

With the x1.5 multiplication factor, my thoughts would be that the x1.5 would need to be factored in as the sensor is seeing 75mm FOV from a 50mm lens etc... even though you are only technically getting 50mm of magnification.

You should be able to get away with 1/60th from 50mm but it all depends on how steady a shot you are. I'm sure there are some people out there that could shoot near 1/15th, if not 1/30th.

I know when I shoot telephoto, I always try to "at least" match the zoom with shutter speed (ie. no less than 1/300th @ 300mm - prefereably at least 1/400th) - unless tripods or something solid to rest upon can be used....or you have no other option, due to cheap lenses and low light.

Remember that it is 1.5x Crop Factor, not 1.5x Magnification.

Your image is just cropped at let's say 200mm, you still only have the reach of 200mm not 300mm. The crop the camera creates just 'looks' like 300mm.

The hand held shutter theories of old still stand true......for most people.

Killakoala wrote:Remember that it is 1.5x Crop Factor, not 1.5x Magnification.

Your image is just cropped at let's say 200mm, you still only have the reach of 200mm not 300mm. The crop the camera creates just 'looks' like 300mm.

The hand held shutter theories of old still stand true......for most people.

This is where I am getting a bit confused. The 1.5x is Crop factor?
I agree the 1/60 is a rule of thumb but iI want to start from a bench mark and then see where I or how much I can deviate.

Of course I am more interested at the 200mm focal lenght.

Whilst Killa's advice is technically correct, there is one more factor to take into account. The smaller image from the D70, due to its sensor size, needs to be enlarged more to make a comparable print from a 35mm camera. Therefore any softness will be magnified. I suggest taking the 1.5x factor into account will compensate for this to some extent. In my experiance it is always preferable to bump up the ISO a little and gain some noise rather then capture a blurred image.

If we were to take this 'guideline' into PHD camera territory, with focal length ranges around 5mm-15mm, would you stll be comfortable shooting 1/15th second for a 200mm FL equivalent?
My advice is don't ignore the crop factor, work with 35mm equivalent (or always think in terms of 35mm equiv focal lengths).