Skip to main content

Focusing screens for the D40

Yes, you can get them for the D40.

There's a very pricey one from Katz Eye. It runs into $100 to $155. It has some good reviews.
There is a pretty cheap one you can get on ebay right now ($34 with shipping), and it might be the same you get from (This one costs $40).

A video tutorial for replacing the focusing screen:

But I would use rubber tipped tweezers, rather than straight metal ones. And don't film your self doing it... :)

The google search url.


  1. Nice, I'm surprised to see how easy it is to replace the screen. Now other than personal preference, is there any real reason one should consider changing the screen? Are there any 'problems' with the default one?
    Thanks for the continued great review of the D40... you are definitely making my decision process a lot easier.

  2. Hi Nick,

    The only real reason I would get the focusing screen is for nostalgic reasons (The manual focus film Nikons had them and I loved them).

    For very low light work (like the long exposure shots) there often isn't an object in one of the three AF zones. This means I have to pan the camera, focus on an object, lock the focus and then pan back. Instead of that I prefer to manual focus, but as you can see, I'm not that good at it.

    The prism focus screen would come in useful at that point.


  3. Well, not really, because the prism is at the center. For these shots I was turning the lens focus ring all the way to the stop, hoping that was infinity, but I have a hunch that the AF lenses might leave a little lee way beyond infinity. I had a similar issue with my film AF zoom. I gotta try MF in daylight and see where infinity is


Post a Comment

Popular posts from this blog

Flowing text in inkscape (Poster making)

You can flow text into arbitrary shapes in inkscape. (From a hint here).

You simply create a text box, type your text into it, create a frame with some drawing tool, select both the text box and the frame (click and shift) and then go to text->flow into frame.


The omnipresent anonymous asked:
Trying to enter sentence so that text forms the number three...any ideas?
The solution:
Type '3' using the text toolConvert to path using object->pathSize as necessaryRemove fillUngroupType in actual text in new text boxSelect the text and the '3' pathFlow the text

Pandas panel = collection of tables/data frames aligned by index and column

Pandas panel provides a nice way to collect related data frames together while maintaining correspondence between the index and column values:

import pandas as pd, pylab #Full dimensions of a slice of our panel index = ['1','2','3','4'] #major_index columns = ['a','b','c'] #minor_index df = pd.DataFrame(pylab.randn(4,3),columns=columns,index=index) #A full slice of the panel df2 = pd.DataFrame(pylab.randn(3,2),columns=['a','c'],index=['1','3','4']) #A partial slice df3 = pd.DataFrame(pylab.randn(2,2),columns=['a','b'],index=['2','4']) #Another partial slice df4 = pd.DataFrame(pylab.randn(2,2),columns=['d','e'],index=['5','6']) #Partial slice with a new column and index pn = pd.Panel({'A': df}) pn['B'] = df2 pn['C'] = df3 pn['D'] = df4 for key in pn.items: print pn[key] -> output …

Drawing circles using matplotlib

Use the pylab.Circle command

import pylab #Imports matplotlib and a host of other useful modules cir1 = pylab.Circle((0,0), radius=0.75, fc='y') #Creates a patch that looks like a circle (fc= face color) cir2 = pylab.Circle((.5,.5), radius=0.25, alpha =.2, fc='b') #Repeat (alpha=.2 means make it very translucent) ax = pylab.axes(aspect=1) #Creates empty axes (aspect=1 means scale things so that circles look like circles) ax.add_patch(cir1) #Grab the current axes, add the patch to it ax.add_patch(cir2) #Repeat