Nikkor Auto 24mm f/2.8 + filter + HN-1 hood = vignetting?

Hello,

 

Got some film scans back with images using a Nikkor Auto 24mm f/2.8 lens, a UV filter and a HN-1 hood. The shots were heavily vignetted. The filter is a Hoya slim-profile model and the HN-1 is a Chinese copy. If the hood were original, would I expect vignetting with this combination? Would I need to not use a filter, even with an original HN-1?

 

Thanks!

There shouldn't be any vignetting on any 24mm 2.8 Nikkor with the HN-1 hood. See:

 

http://www.photosynthesis.co.nz/nikon/accessory.html#24

There shouldn't be any vignetting on any 24mm 2.8 Nikkor with the HN-1 hood. See:

 

Nikon Lens Accessories

 

Thanks Vincent. I have been mounting the hood on the filter and not the other way around. Do you know if the filter can be screwed into the front of a real HN-1? I wonder if the filter and the way that the hood is mounted, that is problem.

No, the filter is too large to screw into the front of the HN-1 --- just checked on mine. I'm not familiar how thick the Hoya filter is, but I'm guessing it is very close to the thickness of the Nikon L37c haze filters I have on all my Nikkors.

 

Just a thought... have you tried shooting with just the HN-1 hood attached, using no filter?

I'm not familiar how thick the Hoya filter is, but I'm guessing it is very close to the thickness of the Nikon L37c haze filters I have on all my Nikkors.

 

Once screwed in, the ring that extends from the lens is approximately 2.5mm in thickness (ie. measuring the thickness of the filter not including the thread for mounting on the lens).

 

Just a thought... have you tried shooting with just the HN-1 hood attached, using no filter?

 

No I haven't (and don't have a digital camera for a quick check), but I'm not sure in the end that I want to use it without a filter. I use UV and skylight filters on all my lenses.

 

Unless your Nikon filters are much slimmer, I think the hood must be at fault.

 

Thanks a again

1) Take the filter and hood off. Take one image.

 

2) Screw the filter on; take one image of the same subject.

 

3) Remove the filter and mount the hood. Take one image of the same subject.

 

Compare the images. See which exhibit vignetting. This should answer your question,

Nikon screw-in hoods such as the HN-1 are typically on the short side so they can fit over filters and not cause vignetting. That is assuming you use Nikon filters which have a fairly slim profile, thicker third party filters may still cause vignetting. If the hood is attached directly to the lens, in many cases you can actually use a deeper hood than the one recommended by Nikon. For example, with the 24/2.8 I'm fairly sure the deeper HN-2 is usable if not attached over a filter.

 

It might turn out your Chinese copy has different dimensions from the original HN-1. The HN-1 is 12.3mm deep from front of the hood to the rim of the lens, and the front inner diameter is 70.3mm. Nikon hoods are have ridges inside to help suppress reflections but they don't have front filter threads, so you cannot attach screw-in filters to the front.

My 24mm f/2.8 AI has had a Nikon filter and an HN-1 on it since before I bought it(i.e. when I pulled it out of the case at the store it was assembled as it is now). I have never had a problem with mechanical vignetting. Optical vignetting(light fall-off) when wide open is a different story, but it's also not terrible on this lens and cleans up by ~f/5.6.

Not totally sure, but the 24mm AUTO uses originally a "2.8 24mm F" hood, later 24mm nikkors use a HN-1 hood which is a slight bit "deeper"

Front lens on the "Auto" is just a bit more recessed compared to non auto 24mm lenses.

 

Check those two pictures for comparisson (and hoods)

- NIKKOR-N Auto 1:2.8 f=24mm No.242932

- NIKKOR 24mm 1:2.8 504041

Interesting. Both lenses have the same optical design (apart from the addition of multicoating to no.504041). According to the specs both are the same length as measured from the lens mount to the rim of the filter ring. Yet the front element of no.242932 does appear to be more recessed than later models, or at least the filter threads are longer. This one looks the same but you will notice the front element is less recessed: NIKKOR-N Auto 1:2.8 f=24mm No.281510

 

There was a break in the serial numbers early in the production of the 24/2.8. The first series has a fairly short run from 242821 - 246387. The aperture ring has a thin wall and turns around an inner sleeve. It accepts AI conversion kit 24. After this point there is a new series starting at 257011 with some mechanical changes. The aperture ring is thicker without the inner sleeve and fits AI kit 23. It appears the overall length also changed. When I get home I will have a close look at my lenses to see what's going on.

 

As for the hood, I am fairly sure the older "2.8 24mm F" hood is the same as the HN-1. Nikon didn't give the hoods the modern name/code until about 1971 or so, roughly coinciding with the introduction of the Nikon F2.

Edited May 15, 2019 by roland_vink

I had a look at my early Nikkor-N 24/2.8 lens no.24xxxx belonging to the first series and compared it to one from the following series. The overall length of my early lens is about 1/2 mm shorter than the later one. In other words the front element is very slightly less recessed, not more recessed as with no.242932 above. I can only conclude that there is some variation in the filter ring when the lens is assembled, resulting in random differences in the overall length.

If your camera is one that shows 100% of the frame in the finder, you can look though at f/16 or f/22 with the lens of concern attached. Mount the filter and hood, and check for vignetting. Hold your fingertip at the front edge of the hood, and gradually move it into the view of the lens at the corner of the frame and see how far past the edge of the hood the finger can go before showing in the frame. Lens should be set at widest angle of view, usually infinity focus with older lenses.