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Forum: Pentax Price Watch 11 Hours Ago  
D FA 70-210mm F4 - Now in stock!
Posted By bladerunner6
Replies: 87
Views: 3,159
I cannot conclusively prove my points nor can you prove yours.

The matter at hand is what does the evidence show as most probable.

If the lens has been significantly modified in design I would ask you how?

The number of elements is the same

The number of groups is the same

The number of ED elements is the same

The barrel length is the same

The barrel diameter is the same

The minimum focusing distance is the same

The maximum magnification is the same


If all these characteristics are the same what could they have changed that would be significant that would not affect all of the above attributes?

As for Pentax demanding higher tolerances, that is certainly a possibility. I have never said anything about that one way or another.

As for who makes the lens the previous two Tamron designed lenses are made in Japan by Tamron.

The 70-210 F4 Tamron version is made in Vietnam where Tamron has a factory. The Pentax lens version is made in Vietnam. While Pentax has a factory In Vietnam the prior relationship has been for Tamron to manufacture the lenses for Pentax. Given Pentaxís small size has a customer it would be unlikely for them to change the terms at this point. The evidence therefore points overwhelmingly to Tamron being the manufacturer.
Forum: Pentax Price Watch 1 Day Ago  
D FA 70-210mm F4 - Now in stock!
Posted By bladerunner6
Replies: 87
Views: 3,159
OMG:

The Tamron has 20 elements, the Pentax has 20 elements.

The Tamron has 14 groups, the Pentax has 14 groups.

The Tamron has three ED elements, the Pentax has three ED elements.

Tamron lens has a length of 6.9 inches, the Pentax has a length of 6.9 inches.

The Tamron has a minimal focal distance 0.95 meters, the Pentax has a minimal focal distance of 0.95 meters.

The Tamron has filter diameter of 67 mm, the Pentax has a filter diameter of 67 mm.

The Tamron has a maximum magnification of 0.32, the Pentax has a maximum magnification of 0.32.

The Tamron has nine blades, the Pentax has nine blades.

The collar for the Tamron fits the Pentax.

The lenses have a remarkably similar appearance.

The Tamron lens appeared first. In all my decades of working in manufacturing I have never heard of a third party introducing a product before the OEM.

Pentax unquestionably has sourced two lenses from Tamron in the last few years.

All this and you expect me to say the lens is more likely made by Pentax than a Tamron?

Sorry, your logic is faulty.
Forum: Pentax Price Watch 1 Day Ago  
D FA 70-210mm F4 - Now in stock!
Posted By bladerunner6
Replies: 87
Views: 3,159
It looks the same.

Has the same focal length

The length of the lens is the same

The optical formula is the same

The minimum focusing distance is the same

The maximum magnification is the same and other similarities

Plus as I said, we have two previous data points that say when all the above are true, the lens is made by Tamron on in their factory. That is incredibly relevant, it shows how their business relationships work.

And your facts do you have that says it was made by Pentax? Tamron makes their version in Vietnam so the country of origin is not a point in your favor.

I absolutely have the ability with live with uncertainty. I wrote the following several days ago about Pentax rebadging the lens:

“Does this bother me-no.

In a declining market partnerships are going to be more and more important. Pentax licensing lenses to Tokina, Pentax licensing lenses from Tamron, Tokina licensing from Viltrox, the L mount alliance, etc.

There is no shame in it, it is just the way the world works.”

I just saying you seem be living in denial that the evidence overwhelmingly points in one direction only.

Saying I should believe in something that has no evidence just because something else is not conclusively proven really is logically flawed.

I am done with this conversation, you are free to continue. Normally I live by qui tacet consentire videtur but in this case I am just ceasing because this is tedious and I have better things to do in life.

And this is a friendly forum and your language is getting a bit hostile.
Forum: General Photography 1 Day Ago  
What are your DSLR dealbreakers?
Posted By bladerunner6
Replies: 161
Views: 3,566
I would like to see this return to the OP’s question for further responses.
Forum: General Photography 1 Day Ago  
What are your DSLR dealbreakers?
Posted By bladerunner6
Replies: 161
Views: 3,566
That is true.

But the only reason I posted this was someone made a comment about people spending $1000 on a phone and in reality that is not the prevalent behavior.
Forum: Pentax Price Watch 1 Day Ago  
D FA 70-210mm F4 - Now in stock!
Posted By bladerunner6
Replies: 87
Views: 3,159
Again, my question is are you saying there is no evidence this is a rebadged lens?
Forum: Pentax Price Watch 1 Day Ago  
D FA 70-210mm F4 - Now in stock!
Posted By bladerunner6
Replies: 87
Views: 3,159
Are you saying there is no evidence that this is a rebadge of the Tamron?
Forum: General Photography 2 Days Ago  
What are your DSLR dealbreakers?
Posted By bladerunner6
Replies: 161
Views: 3,566
And in addition to the magnitudes greater importance of a smartphone not all of them cost $1000.

This is how much your smartphone really costs over a lifetime | Fox Business
Forum: Pentax Price Watch 2 Days Ago  
D FA 70-210mm F4 - Now in stock!
Posted By bladerunner6
Replies: 87
Views: 3,159
Why does it not apply to this lens?

Whether or not it is provable is really a moot point. There is evidence in one direction only.

And as I pointed out- what does it matter? The lens exists because of the rebadging/licensing/whatever you want to call it.

Partnerships as the new normal for smaller manufacturers.
Forum: Pentax Price Watch 2 Days Ago  
D FA 70-210mm F4 - Now in stock!
Posted By bladerunner6
Replies: 87
Views: 3,159
I would say it is higher than yours.

When there is only evidence in one direction and multiple things in that direction that is overwhelming.
Forum: General Photography 2 Days Ago  
What are your DSLR dealbreakers?
Posted By bladerunner6
Replies: 161
Views: 3,566
Thank you. It is good to know there are other people that understand this.

I see people on DPR with literally 30K of gear. And all too often their response to peopleís budget are ignored.

I know, it happened to me there.

And it also happened on the AVSForum when I was shopping for home theater gear.
Forum: General Photography 2 Days Ago  
What are your DSLR dealbreakers?
Posted By bladerunner6
Replies: 161
Views: 3,566
Again, that is pretty much speculation.
Forum: General Photography 2 Days Ago  
What are your DSLR dealbreakers?
Posted By bladerunner6
Replies: 161
Views: 3,566
Your numbers are completely hypothetical.

I can also add that Costco typical customer has an income of $100K.

And the cameras I see pallets of on Black Friday are the $500 two lens kits from Canikon.

I am at lunch and donít have a lot of time to wrap thorough message so I may return to this later.
Forum: General Photography 2 Days Ago  
What are your DSLR dealbreakers?
Posted By bladerunner6
Replies: 161
Views: 3,566
It may seem funny but many people on gear forums donít appreciate the importance of affordability.

Median US household income was $63K in 2018.

U.S. Median Household Income Was $63,179 in 2018, Not Significantly Different From 2017

Figure in food, clothing, shelter, transportation, health care, insurance, communication services, saving for retirement and taxes that does not leave a great many people with the ability to buy a $1500 camera body.
Forum: General Photography 3 Days Ago  
What are your DSLR dealbreakers?
Posted By bladerunner6
Replies: 161
Views: 3,566
Not being able to afford it is the number one issue.

Then dual control wheels.
Forum: Post Your Photos! 3 Days Ago  
Nature Happy Valentines Day.
Posted By bladerunner6
Replies: 6
Views: 170
The ladybug is a nice touch.
Forum: Post Your Photos! 3 Days Ago  
Nature Bodes Nebula and the Cigar Galaxy
Posted By bladerunner6
Replies: 5
Views: 179
Absolutely gorgeous, thanks so much for sharing this excellent astrophoto.
Forum: Post Your Photos! 3 Days Ago  
Streets street performer Las Vages
Posted By bladerunner6
Replies: 7
Views: 232
Grey composition.
Forum: Post Your Photos! 3 Days Ago  
Nature Catching Some Morning Rays. :))
Posted By bladerunner6
Replies: 2
Views: 157
Nice Squirrel shot. You should post it in that thread.
Forum: Photo Critique 3 Days Ago  
Black & White Weaverís Needle
Posted By bladerunner6
Replies: 4
Views: 286
Great use of B&W and the Rule of Thirds. That peak on the right is almost perfectly placed.

The clouds also have an ominous feel.

One of the best landscapes I have seen in a while.
Forum: Post Your Photos! 3 Days Ago  
Nature Mocker mocking me
Posted By bladerunner6
Replies: 6
Views: 196
The pose is awesome and it is really exposed and post processed.

Excellent.
Forum: Post Your Photos! 3 Days Ago  
Machinery Another very
Posted By bladerunner6
Replies: 7
Views: 182
This is well exposed and composed.

My only comment to improve it would be to remove the people in PP.

I want to look at the car not a couple of torsos!
Forum: Post Your Photos! 3 Days Ago  
Architecture Old red barn
Posted By bladerunner6
Replies: 5
Views: 171
This is a pretty solid red barn image.
Forum: Post Your Photos! 3 Days Ago  
Nature Daurian Redstart
Posted By bladerunner6
Replies: 9
Views: 214
It is a beautiful bird and you did it justice.
Forum: Post Your Photos! 3 Days Ago  
Abstract I'm sure I can smell an ant somewhere...
Posted By bladerunner6
Replies: 7
Views: 180
Nice capture and cute title.
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