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Tamron SP 500mm f8 (BBAR)
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PostPosted: Fri Jul 23, 2021 8:01 am    Post subject: Tamron SP 500mm f8 (BBAR) Reply with quote

As a 60-70 ft/15-18m portrait lens, not too shabby.
1/250 sec at ISO 200, D-200.


Wildlife needs to learn to sit still for their portrait.
These Ravens were fighting over food scraps in this aluminum foil.
I was fortunate to get one sort of in focus.
1/250 sec at about 65 feet/16 meters.



Another smoky sunset.
Not quite to the hard infinity stop.
1/60 sec.



C-130 Hercules in the foreground.
From 30 Meters to the Infinity stop is a bit on the tight side.
Focusing requires a feather touch, and naturally enough, a tripod.
Well over 1/2 kilometer from the sensor Wink plane.
1/125 sec.


Swang 'Stang. Front end is up on blocks.
1/125 sec.


Lens is not quite what I was hoping for.
It is difficult to use at extended distances.
It does have some very, very fine points, as shown above.
I may have to do something different for deer at a distance~ like a long E.D. Nikkor super telephoto...

-D.S.


PostPosted: Fri Jul 23, 2021 1:47 pm    Post subject: Reply with quote

Like 1 Like 1

Which one? (both have BBAR) Smile

http://adaptall-2.com/lenses/55B.html
http://adaptall-2.com/lenses/55BB.html

Thanks!


PostPosted: Fri Jul 23, 2021 4:33 pm    Post subject: Reply with quote

It is the earlier 55 B.

-D.S.


PostPosted: Fri Jul 23, 2021 5:35 pm    Post subject: Reply with quote

I have the 55BB and some 35 years experience with mirrors. I found, soon after the beginning of my experience with mirrors, that it takes practice and paying attention to good technique if I wanted keepers. Back in my film days, I found it very helpful to use an eyepiece magnifier with a camera that had a plain matte focusing screen. I was able to dial in exact focus that way. Not exactly the best setup when shooting moving subjects, but it did work well.

These days, many digital cameras have the ability to bump up magnification, so that you can do much the same thing. This is the way I routinely use my Tamron 500 nowadays, and it has resulted in critically sharp images.



PostPosted: Fri Jul 23, 2021 6:11 pm    Post subject: Reply with quote

It's a 16 year old D-200 I'm using.
An eye-piece magnifier would go a long ways towards using this lens properly.
I set the eye-piece diopter to work with my +250 readers.
I'm too far sighted to use the eyepiece without optical correction- just a matter of rapidly advancing age.
I think finding a rubber eye-cup to go up against the lens of my glasses would help a lot.

-D.S.


PostPosted: Sat Jul 24, 2021 1:15 pm    Post subject: Reply with quote

Something else I do as a matter of course with my 500mm Tamron, is I will take multiple photos of a subject, refocusing before each exposure. I find that it improves my odds somewhat that I'll get one very sharp photo out of several that are only just sharp.


PostPosted: Sat Jul 24, 2021 5:22 pm    Post subject: Reply with quote

You are correct about multiple images with refocusing each frame.
I actually took 11 or 12 frames before I found the detail I wanted.
Focus confirmation is useless with this lens- at least on the D-200.

Full "Buck" moon.
1/250 sec ISO 400. Tripod.
That's as sharp as it's going to get, shooting through all the wildfire smoke.
Still not quite to the hard infinity stop.
I focused on the edge of the large crater at upper left.
Breathe on the straight ribbed focus sleeve, and focus will change...


Pocket knife.
1/60 sec ISO 400.
Note pocket lint caught on the sharp edge.
6-3/4 feet according to the focus scale.


Indiglo wrist watch with raven dropping.
1/125 sec ISO 400. 6-3/4 feet again.


I will try with Luna again on the next fingernail phase.
Detail gets washed out by strong light on the full phase...

-D.S.


PostPosted: Sat Jul 24, 2021 9:53 pm    Post subject: Reply with quote

Doc Sharptail wrote:

I will try with Luna again on the next fingernail phase.
Detail gets washed out by strong light on the full phase...


Please do so. Your Tamron 500 is capable of producing much sharper moon shots than the one you show. As for the full moon, I personally like to shoot pics of it a couple days before or after the full phase. Features are flat at full, whereas a couple days before or after, the moon is at a slight angle and the shadows are better, which serves to define surface features better, I find.

Correct exposure for the moon is 1/125 at f/8 (or f/11 if you have an aperture, which often yields better contrast) at ISO 100. You were overexposing by about a stop, although your photo isn't really showing any indication of overexposure.

Here is a shot I took with my Tamron 500 of the moon in a waning gibbous phase, several days past full. Please note, this is a color image. The Tamron even picked up some slight yellow and bluish tinges to the moons surface.

Sony NEX7, 1/125, ISO 100, Tamron 500mm f/8 55BB


PostPosted: Sat Jul 24, 2021 10:28 pm    Post subject: Reply with quote

I will be trying this again, perhaps with a higher moon.
It is very low in the sky on this phase.
I did my test frames in color and they were terribly brown from atmospheric conditions- which probably led to the exposure I ended up with.

I may not have to wait so long. The arc of the full moon in August is a lot higher....

I'm having a great time trying. It is time well spent for me.

-D.S.


PostPosted: Tue Jul 27, 2021 7:56 am    Post subject: Reply with quote


Argyle building.


Bank of Nova Scotia in long evening sunrays.



Lindsay building parapet runner.



Lindsay Building parapet runner.



Paris Building gargoyle.



Paris Building Bas-relief.

These buildings are all over 100 years old.
Most of the stone-work is badly weather eroded.

-D.S.


PostPosted: Mon Aug 16, 2021 2:56 am    Post subject: Reply with quote

B.B.A.R. = Broad Band Anti Reflex.

Tamron's designation for coatings on some of their lenses.
Lesser moon phases still have atmospheric interference in the form of smoke.
This may take a while...

-D.S.