Question to Nikon N2000/2020 owners

M-88 · Apr 18, 2019

Hello

I'd like to ask a question to those who own Nikon N2000/N2020 (F-301/F-501). I know that unlike F/F2/FE/FM these two have rectangular eyepiece. So would anyone be so kind to measure the dimensions of the eyepiece?

I'm asking because I have Olympus Varimagni finder and would like to buy N2000/N2020 if it can be fitted to it.

Thank you

M.

neilt3 · Apr 19, 2019

Measurements of the F-301 are at the widest are 24.91mm and 15.8mm high .
The inner dimensions from in the grove are 21.93mm wide .
The shape of the eyepiece is rectangular .

By contrast the eyepiece on my OM-10 has it's sides slightly curved but at it's widest it is 23.02mm by 14.27mm high .
The inner dimensions in the grove are 20mm wide .

So I would say the only way your getting your Varimagni finder onto the F-301/F-501 is with a hammer !

M-88 · Apr 20, 2019

neilt3 said:
Measurements of the F-301 are at the widest are 24.91mm and 15.8mm high .
The inner dimensions from in the grove are 21.93mm wide .
The shape of the eyepiece is rectangular .

By contrast the eyepiece on my OM-10 has it's sides slightly curved but at it's widest it is 23.02mm by 14.27mm high .
The inner dimensions in the grove are 20mm wide .

So I would say the only way your getting your Varimagni finder onto the F-301/F-501 is with a hammer !

Thank you for the note and extra thank you that I don't need to convert imperial units into metric. Looks like F-301's eyepiece is of the same dimensions as F80, except the height - it's 17 mm on the latter. Varimagni won't fit it, groves are not the only problem, the eyepiece is also a bit thick. So I'll have to use a file and sandpaper. My N2020 will arrive in 12 days or so, then we'll see.

Another question: Ken Almighty stated on his site about F-501 that:
"Long Exposures
Maximum exposure time in A mode: 6s at any aperture at ISO 100.
Varies with ISO, not aperture.
Only about 1.5s at ISO 400. Maximum of 27.5s at lower ISOs."

What sorcery is this? Does F-301 work like that too? I can't remember any other camera that would have its long exposure tied to ISO setting.

MattKing · Apr 20, 2019

M-88 said:
I can't remember any other camera that would have its long exposure tied to ISO setting.

Most likely this is related to the sensitivity limits of the metering circuits.

M-88 · Apr 20, 2019

MattKing said:
Most likely this is related to the sensitivity limits of the metering circuits.

Whatever it is, I have never encountered it anywhere else. Let alonse such short "long" exposure. I was laughing at my friends Minolta X-700 for his 4 second maximum speed. I think sneaky Nikon avoided stating it in the manual. I should double-check.

MattKing · Apr 20, 2019

M-88 said:
Whatever it is, I have never encountered it anywhere else. Let alonse such short "long" exposure. I was laughing at my friends Minolta X-700 for his 4 second maximum speed. I think sneaky Nikon avoided stating it in the manual. I should double-check.

Remember this restriction is with respect to "A" mode.
I think you will find lots of others that have similar restrictions in "automatic" mode.
For example, the OM-20/G manual specifies a range of 2 seconds to 1/1000 second at ISO 100 when set to automatic mode.
In contrast, the OM-2s manual specifies an "exposure control range: about 1 min. ~ 1/1000 sec.; light measuring range: approx.
-5EV~ 18EV (ISO/ASA 100, 50mm F1.4, normal temperature and humidity);"

M-88 · Apr 20, 2019

MattKing said:
Remember this restriction is with respect to "A" mode.
I think you will find lots of others that have similar restrictions in "automatic" mode.
For example, the OM-20/G manual specifies a range of 2 seconds to 1/1000 second at ISO 100 when set to automatic mode.
In contrast, the OM-2s manual specifies an "exposure control range: about 1 min. ~ 1/1000 sec.; light measuring range: approx.
-5EV~ 18EV (ISO/ASA 100, 50mm F1.4, normal temperature and humidity);"

Sure. But in manual mode there's just 1 second and slower than that is only Bulb. I remember using OM-2 for around 30 seconds ans in one case used OM-4 for 140 seconds. Even thought that batteries died in the middle of a shot I had OMG and OMPC for a very short time and testing slow speed never occured to me. I also don't know how long Nikon FE can go. Might give it a try one of these days, it's praised by many for long exposures and it's also got speeds up to 8 seconds on manual speed dial. Reminds me of Ricoh XR7 which has speeds up to 16 seconds.

neilt3 · Apr 20, 2019

M-88 said:
Whatever it is, I have never encountered it anywhere else. Let alonse such short "long" exposure. I was laughing at my friends Minolta X-700 for his 4 second maximum speed. I think sneaky Nikon avoided stating it in the manual. I should double-check.

Never noticed this with longer exposures on cameras .
For most stuff I shoot in aperture priority and use the cameras meter , but when I'm doing anything than a couple of seconds I change over to manual exposure , setting the speed on camera if the camera's shutter speed goes to what I want , or setting it to bulb and counting it out in my head .
Either way if it's longer than a second most films need a bit of correction for reciprocity failure , and the camera won't know how much by and doesn't take it into account .
If your meter reading is 6 seconds with Ilford FP4 the exposure needed is 14 seconds .
A metered 30 second exposure needs 160 seconds .
So not having a longer automatically set shutter speed is probably less to do with the meter's capabilities and more down to the exposure being no where near what it needs to be depending on what film is used , after all , you only set the ISO on the camera , not the brand and type .

And then seeing as I've usually forgotten to bring a chart with the correction figures on I usually end up thinking of a number and trebling it !

M-88 · Apr 21, 2019

neilt3 said:
Never noticed this with longer exposures on cameras .
For most stuff I shoot in aperture priority and use the cameras meter , but when I'm doing anything than a couple of seconds I change over to manual exposure , setting the speed on camera if the camera's shutter speed goes to what I want , or setting it to bulb and counting it out in my head .
Either way if it's longer than a second most films need a bit of correction for reciprocity failure , and the camera won't know how much by and doesn't take it into account .
If your meter reading is 6 seconds with Ilford FP4 the exposure needed is 14 seconds .
A metered 30 second exposure needs 160 seconds .
So not having a longer automatically set shutter speed is probably less to do with the meter's capabilities and more down to the exposure being no where near what it needs to be depending on what film is used , after all , you only set the ISO on the camera , not the brand and type .

And then seeing as I've usually forgotten to bring a chart with the correction figures on I usually end up thinking of a number and trebling it !

It is reasonable indeed to use Bulb mode and reciprocity chart when working at night.

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