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 Replies: 137 / Views: 18,638 |
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Pillar of the Community
 Canada
4944 Posts |
I got my focusing helicoid in the mail today, so I was able to use the El-Nikkor Lens for the first time. I couldn't use the extension rings with this set, because they haven't arrived yet. It's alot easier to get the coin in focus with the helicoid, then it was with the 18-55mm lens.   Edited by Canadian-Banknotes
01/20/2014 9:50 pm
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Moderator
 United States
23522 Posts |
At forum posting size of 800px or so, I suspect you'll find these two lenses indistinguishable. I see some minor differences in the larger images you've posted - perhaps just due to the 18-55 images being larger - and at 100% the differences should be night and day. This says a lot about the 18-55, and none of it bad.
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Pillar of the Community
Canada
4944 Posts |
Thanks Dave, would the extension rings allow me to get bigger pictures?
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Pillar of the Community
Canada
4944 Posts |
Here is a comparison picture that shows the El-Nikkor Obverse image next to the Canon 18-55mm Obverse Image. I should note that I bumped the Contrast up another 8% on the El-Nikkor image, just to fix the dull look in the original one I posted. I forgot to put my settings for the El-Nikkor shots in my other post, so I will add that now. Aperature: F8 / Exposure: 160 / ISO: 400  It looks like I am losing luster with the El-Nikkor lens. |
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Pillar of the Community
Canada
4944 Posts |
When I am tethering the camera to my Laptop with the settings mentioned in the post above, the live view is very dark, But the images come out normally.
When I was first setting up tethering with the El-Nikkor, based on what I could see in the live view, the best set-up was:
Aperature: F4 / Exposure: 160 / ISO: 1600
But when I actually shoot the picture, it's really overexposed.
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Valued Member
Canada
478 Posts |
I haven't been using my extension rings...I have it set up to take the largest size coins I have and use that for all...Im just to lazy to change the rings for different size coins lol Here are some coins shot just today using the same extension rings for all...   |
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Pillar of the Community
Canada
4944 Posts |
Very Nice rmc!
Which Rings are you using?
Edited by Canadian-Banknotes
01/21/2014 10:12 pm
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Valued Member
Canada
478 Posts |
I only have the 14mm ring in. Just the right size for the large coins...the small coins like the penny seem like they are a million miles away but after I crop them in editing all is better and I didn't have to fool around with the rings. Lazy?...yep lol. I'm waiting for my bellows to arrive than I will do away with the rings all together...(I think) LIGHTING, LIGHTING, LIGHTING! What works for one will not necessarily work for the other. MAKE NOTES Sorry Ray and Dave...I know you will probably spank me for not using the rings properly  Edited by rmc
01/21/2014 10:31 pm
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Pillar of the Community
Canada
4944 Posts |
Looking at it again, I guess my Morgan shots and your pictures are about the same size.
Yeah, I haven't played around with other coins yet, but I have a page for the settings I am using for Morgans (so far).
I'm surprised nobody has noticed this yet (Or maybe they haven't mentioned it) but if you look at the El-Nikkor reverse Morgan image. You can see that one side has a bluish coloured light, and the other is more yellow. I think I grabbed two different types of tissue paper, resulting in different diffusion.
Edited by Canadian-Banknotes
01/21/2014 10:34 pm
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Pillar of the Community
Canada
4944 Posts |
Quote:
When I am tethering the camera to my Laptop with the settings mentioned in the post above, the live view is very dark, But the images come out normally.
When I was first setting up tethering with the El-Nikkor, based on what I could see in the live view, the best set-up was:
Aperature: F4 / Exposure: 160 / ISO: 1600
But when I actually shoot the picture, it's really overexposed. Here are some pictures of what I am referring to. When I use these settings; F4 / Exposure: 160 / ISO: 1600, I can see the coin easily using live view.  The problem though, is when I take the picture it is really overexposed.  When I use these settings; Aperature: F8 / Exposure: 200 / ISO: 400. I can't really see anything in live view.  But this is what I see when I take the shot.  |
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Pillar of the Community
Canada
4944 Posts |
Here's my second set of images with the El-Nikkor. I think I figured out how to get rid of the dull look that I had in the first set. Comments/Opinions?   |
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Moderator
United States
23522 Posts |
The El-Nikkor has no way of telling the camera what its' aperture setting is. That's why your images are dark in Live View - the camera defaults to the numerically-lowest aperture setting out of bewilderment. Set aperture at the lens (f/8, and never touch it again, please  ), Exposure for what you know works on the final shot, and then manually bump up the ISO until you get something onscreen that's bright enough to focus with. Once you have focus, bump the ISO back down to the appropriate level and shoot it. If you've got the exposure wrong you just adjust it onscreen and snap new shots until you've got it where you want - you know the focus won't need to change. If you need as much as ISO400, you're probably under-lighting the coin. I rarely exceed ISO200, even with only two Jansjos. For the record, you should be able to fill the sensor with that Morgan. No white space, top or bottom. If you aren't yet, you need more mag, either more extensions or more bellows extension. The El-Nikkor is up to it, trust me. |
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Pillar of the Community
Canada
4944 Posts |
Quote:
For the record, you should be able to fill the sensor with that Morgan. No white space, top or bottom. If you aren't yet, you need more mag, either more extensions or more bellows extension. The El-Nikkor is up to it, trust me I have tried getting the coin to fill the sensor, but I can't focus on the coin at all, unless I am 1-1/2 to 2 feet from the coin. |
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Pillar of the Community
Canada
4944 Posts |
Dave, will the extensions allow me to get close to the coin, and still be able to focus?
Those pictures above were taken with no Extension rings. Just the lens and focusing helicoid.
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Pillar of the Community
United States
4038 Posts |
You probably need the extensions to increase magnification to fill the sensor with the coin. The helicoid is not long enough to get the mag to that level on its own.
Note that the 18-55 communicates its characteristics to the camera, which does some compensation in contrast, sharpness, and chromatic aberration correction. This is the advantage you have with macro lenses that are built by the same mfr as the camera, and chipped to contain the compensation data. It's pretty clear from the comparison shot that the 18-55 has been slightly enhanced, likely by the camera. Did you shoot in RAW? I don't know if RAW includes lens corrections or if it just takes the "raw" sensor data. SD, do you know?
edited to add...the over-exposure business is why I don't like to work in Manual mode. Av would have eliminated this problem.
Edited by rmpsrpms
01/25/2014 10:46 pm
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Replies: 137 / Views: 18,638 |
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