Imagemaster wrote:
Jim, needless to say, it is another cloudy, rainy day in the PNW so have just taken some test shots with my 1D4. The AF in AI Servo works this time, and AF in One Shot mode works with a Kenko 1.4x DGX TC.
Hopefully will get to test with 70D tomorrow.
Just for anyone's interest, the serial number on my first copy was 0018XX and on this copy is 0070XX. Seems to confirm this is from Tamron's second shipment to North America.
How does that confirm that. My first one was around 3500 and I bought it a month ago. Just got my replacement. It is around 5000. Sounds like you got a lens that was returned. I hope they fixed it.
kiwijoslin wrote:
How does that confirm that. My first one was around 3500 and I bought it a month ago. Just got my replacement. It is around 5000. Sounds like you got a lens that was returned. I hope they fixed it.
Do you know what you are talking about? The serial numbers are six digits, not four digits.
For your enlightenment, a serial number of 3500 is NOT the same as a serial number of 003500.
And if the serial number of your replacement is around 005000, my serial number of 0070XX, suggests that my copy came off the assembly line at least 2000 lenses later than yours.
Now try explaining to me how my serial number sounds like I got a lens that was returned.
Imagemaster wrote:
For your enlightenment, a serial number of 3500 is NOT the same as a serial number of 003500.
And if the serial number of your replacement is around 005000, my serial number of 0070XX, suggests that my copy came off the assembly line at least 2000 lenses later than yours.
Now try explaining to me how my serial number sounds like I got a lens that was returned.
Because I have been told that new ones are around 10,000
I requested one that had been on the bench and fixed.
I will add to that a couple of things.
When I gave Tamron my SN they did not need the two zeros, so it must be valid without them.
Also it is my feeling, theory that at some point they stop production of the lens to fix the problem. I think they also recalled all the iunsold lens without saying anything. How else do you explain the dead space once they started selling them.
Hopefully your was fixed.
I might add you were the one who thought the SN would have nothing to do with the lens. I did and still do.
kiwijoslin wrote:
Also it is my feeling, theory that at some point they stop production of the lens to fix the problem. I think they also recalled all the iunsold lens without saying anything. How else do you explain the dead space once they started selling them.
Seems you have been told a lot and have theories.
Well how about they can only produce the lens at a certain rate. The first shipments to N. America all sold out, and you just seem to think they can immediately ship out more.
I guess you have never heard of the term "backorder". Even Canon lenses can be backordered. Call it dead space if you want.
You have no proof that they recalled all the unsold lenses.
The local store that I purchased my lens at has been getting small numbers of these lenses consistently. They still have a waiting list of more than 50 people. It has been stated in another post by an employee of a large mail order store that just because the item shows that there is a waiting list doesn't mean that they haven't been shipping lenses. I think Tamron underestimated the demand and also released a lens sooner than they should have.
Imagemaster wrote:
Seems you have been told a lot and have theories.
Well how about they can only produce the lens at a certain rate. The first shipments to N. America all sold out, and you just seem to think they can immediately ship out more.
I guess you have never heard of the term "backorder". Even Canon lenses can be backordered. Call it dead space if you want.
You have no proof that they recalled all the unsold lenses.
Carry on with your feelings and theories.
I guess amount other things you can not read. I did not say I had proof. I did say it was my theory.
You continue to read what you want.
I still think you have a recycled lens.
Prove me wrong.
Imagemaster wrote:
We'll I don't really care about your theories or your guess about my lens not being new.
I don't need to prove anything to you, just as you have proved nothing to me.
Time you were on my HIDE ME list anyway. Bye, bye.
Tst you own theory and put your head in the sand.
According to your math Tamron has produced about 2,000 lens per month for a high demand lens.
That does not seem correct.
Imagemaster wrote:
I'm pretty sure owners of Canon 600mm & 800mm lenses do not have to re-press the shutter button or manually prefocus, even with TC's attached.
I have to manually prefocus with 300mm 2.8L and 2x II on 1D3 and 1D4 when making large shifts in focusing distance in servo mode.
Going from close bird to distant tree, AF indicates focus acquisition but lens does not budge either when holding the AF-ON down or pumping it. Need to swing the FTM ring to the approximate range and then it focuses immediately upon hitting AF-ON.
Just can't trust these first-tier companies to test anything befor releasing it...
No problems with the 300mm without the TC, it rides the focus as you'd expect in servo mode.
luminaire wrote:
I have to manually prefocus with 300mm 2.8L and 2x II on 1D3 and 1D4 when making large shifts in focusing distance in servo mode.
Going from close bird to distant tree, AF indicates focus acquisition but lens does not budge either when holding the AF-ON down or pumping it. Need to swing the FTM ring to the approximate range and then it focuses immediately upon hitting AF-ON.
Just can't trust these first-tier companies to test anything befor releasing it...
No problems with the 300mm without the TC, it rides the focus as you'd expect in servo mode.
But if the distant region is completely OOF, then of course lens won't shift to it, there's no phase information or contrast to assist the AF. If I have the distance limiter switch set appropriately I don't see this behavior very often at all.
