Lens HELP!

[Gukbe2000]

Hi,

I have a Red Rock m2 lens adapter and currently have a 50mm Nikon Nikkor lens which gives me great depth of field. My problem is that sometimes I want a real wide depth of field instead of such a shallow depth of field. Can someone recommend a good, affordable Nikkon lens that can give me this?

Thank you!

 

[Ryan Patrick O'Hara]

You really just need to stop the lens down... which requires more light, obviously.

Sure you can get another lens, say a 24mm, which will have a deeper DOF compared to the 50mm SO LONG AS the camera to subject distance and iris are the same.

However, to compensate for the wider FOV of the lens, you'll most likely bring the subject closer to the lens for the same composition. Hence the DOF becomes just as shallow. The background perspective will also be different, and hence the wider lens may appear to have deeper DOF, but it kind of cancels out.

Truth is there are three things that control DOF.... two of which cancel each other out should you go for the same composition of a foreground subject. As mentioned longer lenses can have the illusion of shallower DOF but it is not.

Simply shoot at a slower F-stop.

For more about DoF: http://www.ryanpatrickohara.com/Download/DepthofField.pdf

 

[j1clark@ucsd.edu]

Hi,

I have a Red Rock m2 lens adapter and currently have a 50mm Nikon Nikkor lens which gives me great depth of field. My problem is that sometimes I want a real wide depth of field instead of such a shallow depth of field. Can someone recommend a good, affordable Nikkon lens that can give me this?

Thank you!

Your 50mm Nikon lens should do the job, just stop down, and add more light.

Here's a Depth of Field calculator, which has a number of cameras, films, sensor sizes, Circle of Confusion, options to choose from. The problem with the 'adapters' is it may be difficult
to find the correct selection from 'standard' cameras and lenses.

But if you have info on how the adapter 'behaves', perhaps you can a priori calculate whether the 50mm will do what you want.

The alternative is to test the effective DoF with the lens setup you have, and empirically determine the DoF.

http://www.dofmaster.com/dofjs.html

 

[SeanEmer]

Depending on the content of your shot, you could also simply removed the lens adapter. While there will be aesthetic shifts in your image, you should be able to minimize them through proper lighting and color grading.