Nikkor Z 40mm f/2

[Øivind Tøien]

I'm using the HN-3 hood, in fact a very old version with a lot of nicely engraved lettering on it. So far, it has  protected well  the 40/2 during the inevitable falls to the ground, but it does have acquired some dents and nicks over time. The 40 lens itself seemingly has survived some very bad impacts including being dropped on frozen ground or pavements.
...

Does the original HN-3 allow attachement of a 52mm filter on the front and more important to me, a 52mm lens cap?

The ebay offerings I see are pretty pricey for old scratched up original HN-3's - I found this alternative on Amazon that also is somewhat costly, but it allows a 52mm filter/lens cap to be attached on the front. It seems slightly shorter (HN-2 like?) and might not provide quite the same protection/shading. On the other hand for keeping it permanently attached the compact size would be an advantage. https://www.amazon.com/Haoge-Metal-NIKKOR-Compatible-Filters/dp/B0B88J2SGL/
I also found similar ones on ebay also allowing 52mm cap, for instance: https://www.ebay.com/itm/285423835491?

[MEPER]

For the 40/2 I use a Nikon HR-4 hood which is a collapsible rubber hood. The 52mm Nikon cap fits the hood (both collapsed and not collapsed).
The rubber is quite thick good quality so will protect a bit if lens is dropped.

[Jürgen Pfeiffer]

Does the original HN-3 allow attachement of a 52mm filter on the front and more important to me, a 52mm lens cap?

The ebay offerings I see are pretty pricey for old scratched up original HN-3's - I found this alternative on Amazon that also is somewhat costly, but it allows a 52mm filter/lens cap to be attached on the front. It seems slightly shorter (HN-2 like?) and might not provide quite the same protection/shading. On the other hand for keeping it permanently attached the compact size would be an advantage. https://www.amazon.com/Haoge-Metal-NIKKOR-Compatible-Filters/dp/B0B88J2SGL/
I also found similar ones on ebay also allowing 52mm cap, for instance: https://www.ebay.com/itm/285423835491?

Here you go...

[Jürgen Pfeiffer]

and HS-12 fits also very well

[Øivind Tøien]

Here you go...

Thanks, Jürgen (and MEPER). Does the HN-3 also accommodate a filter on the front? (A filter is likely best mounted between the hood and the lens, but the threads may help to keep the lens cap secure.)

[Jürgen Pfeiffer]

Thanks, Jürgen (and MEPER). Does the HN-3 also accommodate a filter on the front? (A filter is likely best mounted between the hood and the lens, but the threads may help to keep the lens cap secure.)

Helio Øivind,
if you want to mount the filter "inside" the HN-3 hood – no, this does not work, there is no dedicated 52mm thread as in the hood shown at amazon.

[Øivind Tøien]

Thanks, anything else (rilles etc.) that might help keep the lens cap secure?

[MEPER]

The HR-4 has filter thread. The HR-4 was meant for a 35mm or 50mm lens. It is quite compact.
The first image shows the 40mm with HR-4 + a 52mm filter attached in the HR-4 thread.

[Jürgen Pfeiffer]

Thanks, anything else (rilles etc.) that might help keep the lens cap secure?

Helio Øivind,
As shown in my photo, the lens cap snaps securely into the HN-3

[Øivind Tøien]

Thanks Jürgen and MEPER.