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Tamron Adaptall 140F 1.4X TC

Reviews Views Date of last review
7 19,004 Fri May 27, 2016
Recommended By Average Price Average User Rating
100% of reviewers $80.00 8.86
Tamron  Adaptall 140F 1.4X TC

Tamron  Adaptall 140F 1.4X TC
Tamron  Adaptall 140F 1.4X TC

This 1.4x TC is adaptall and only fits adaptall lenses

"The 140F converter was designed to be used with Tamron's SP 90mm models 52B and 52BB, SP 300mm F/2.8, SP 400mm F/4, SP 200-500 F/5.6, and the SP 350mm F/5.6 and SP 500mm F/8 mirror lenses. Tamron's literature states that this converter is compatible with all Tamron fixed focal length lenses of 90mm and longer. This converter also performs well with all Tamron zoom lenses which have a stationary master group (the rearmost group of lens elements), and can also be used with many Tamron wide to tele zoom lenses for increasing maximum macro magnification by 1.4X. The optical design uses high dispersion glass and features a doublet combined with an air spaced double concave lens (thus forming a strong air spaced triplet) for creating the magnification effect. The rearmost doublet decreases the magnification effect and serves to flatten the field and to correct off-axis aberrations. -

Lens Model 140F
Focal Length 1.4X the focal length of original lens
Aperture Range f/2.8 45, AE (Original lens F number x 1.4)
Optical Construction: (Groups / Elements) 3 / 5
Min. Focus from Film Plane Retains the min. focus of original lens.
Macro Mag. Ratio 1.4X the mag. ratio of original lens.
Diameter 2.5" (64.5mm)
Length at Infinity in. (mm) w/Nikon mount 0.86" (21.9mm) [1.04" (26.4mm)]
Weight 6.0 oz. (169g)

Caps: AFAIK only the proprietry tamron lens cap will fit the TC on the lens side. Although the the optical group protrudes a bit on the other side, a canon eos body cap will fit; or use an original cap. See here.

This thread is a discussion of diffraction issues when using TC's.

1.4x Tc's discussion/comparison thread.
Price History:

Add Review of Tamron  Adaptall 140F 1.4X TC
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New Member

Registered: February, 2012
Posts: 15
Lens Review Date: May 27, 2016 I can recommend this lens: Yes | Price: $50.00 | Rating: 9 

Pros: Light, very little image degradation
Cons: Adaptall lenses only, and it has to go in the middle
Camera Used: Samsung GX-10, GX-20, Pentax K-x   

My copy of this is not quite perfect. I cleaned a blob of muck off the rear element that turned out to have been placed deliberately to cover some tiny scratches, but I don't think they can be greatly affecting the image quality.

I find that with the lenses that it is compatible with, targets snap in to focus, and there seems to be less purple fringing than there is without it.

The 140F is compatible with many, but not all the Adaptall lenses I have tried.

It works with all the Adaptall 1 long primes I have tried:
  • 135mm f2.8
  • 200mm f3.5
  • 300mm f5.6 (both versions)
It works with the following Adaptall 1 zooms I have tried:
  • 80-250mm (all three versions)
  • 85-210mm
  • 70-150mm
  • 70-350mm
It works with all the Adaptall 2 long primes I have tried:
  • 72B (90mm f2.8)
  • 01B (135mm f2.5)
  • 02B (200mm f3.5)
  • 54B (300mm f5.6)
  • 55BB (500mm f8 mirror)
It works with the following Adaptall 2 long zooms I have tried:
  • 02A (70-150mm f3.5) (this is a tight squeeze)
  • 23A (60-300mm f3.8-5.4)
  • 104A (75-250mm f3.8-4.5)
It does not work with:
  • 03A (80-210mm f3.8-4)
  • 04A (75-250mm f3.8-4.5)
  • 46A (70-210mm f3.8-4)
  • 103A (80-210mm f3.8-4)
  • 19AH (70-210mm f3.5)
On these, the rear lens group snags.

I did a simple comparison between:
  1. 02B + 140F (200mm f3.5 plus TC)
  2. 54B (300mm f5.6 prime)
  3. CZ250 + 140F (80-250mm f3.8-4.5 Adaptall 1 zoom plus TC)
My target was an azalea bush about 10m away.

By eye, I couldn't discern any difference between the 200mm plus TC image and the 300mm prime image, although the 300mm prime lens JPEG was 3 percent larger.

I could possibly see a difference with the zoom; the JPEG was 3 percent smaller.

Overall, I think it is excellent. I give it 9.
Site Supporter

Registered: April, 2011
Location: Lost in translation ...
Posts: 17,656
Lens Review Date: December 21, 2013 I can recommend this lens: Yes | Price: None indicated | Rating: 8 

Pros: Build, size, IQ ...
Cons: None ... except will not take all AD-2 lenses ...


Just acquired this 140F and like what I have seen thus far ... only a few test shots, since the outside weather is wet and cold ... will post samples later.

Giving a straight across "8" rating until more test and use can be done ...

Allez et salut, Jean le Green Frog

Here's a p0rn shot to see what the 140F looks like ...

Veteran Member

Registered: October, 2009
Location: Sydney
Posts: 448
Lens Review Date: December 30, 2011 I can recommend this lens: Yes | Price: $130.00 | Rating: 8 

Pros: Nice solid build
Cons: Does not fit on the 70-200 (19AH)

Purchased this to go with a Tamron Adaptall-2 70-210 (19AH), unfortunatly it does fit due to the rear lens group of the lens protruding too far (about 5-6mm).
Site Supporter

Registered: November, 2010
Location: California
Posts: 2,223
Lens Review Date: April 22, 2011 I can recommend this lens: Yes | Price: None indicated | Rating: 10 

Pros: Sharp, designed for Adaptall lenses and does not change the IQ
Cons: None. Maybe it is too fast!

It came with a Tamron Adaptall long lens I purchased. It extend the focal lengh of the right lens by 40% taking away less than one f-stop. Which is best, it does not change the IQ of the lens. It is usually accompany one lens. Hard to get alone.
Loyal Site Supporter

Registered: January, 2008
Location: Paris, TN
Posts: 2,985
Lens Review Date: January 10, 2010 I can recommend this lens: Yes | Price: $80.00 | Rating: 9 

Pros: Dedicated optics quality
Cons: Can be 'fiddly' to mount and remove

I've used this with SP 90/2.5, SP 35~80/2.8, SP 80-200/2.8, SP 180/2.5 and SP 300/2.8 Adaptall-2 lenses.

Keeping in mind that a tele-extender is an alternative to owning (or even just carrying!) a longer lens and that it will most likely be used at the longer end of the zoom lens range, one must admit that convenience is a positive factor that sometimes more than offsets any degradation in IQ.

The noticeable difference between this and the 1.4X Pz-AF's seems to be slightly better bokeh in OOF areas and more consistent sharpness and contrast across the full range of practical apertures. In practical use, there's very little difference between this TC and the Pentax AFA 1.7 unit.

Given the choice between this and any of the 2X TC's, I'd pick this one as it works well on all the SP lenses while the 2X SP200 seems to be a little beyond my own personal limits for consistent field work with the longer lenses like the SP 300-2.8 and CZ-500.

If you're serious about using TC's with Adaptall lenses, I believe the benefits are worth the relatively low cost of acquiring the AD-2 TC's.

Site Supporter

Registered: June, 2008
Location: Florida Hill Country
Posts: 17,292
Lens Review Date: December 1, 2008 I can recommend this lens: Yes | Price: $50.00 | Rating: 9 

Pros: Light weight, multiple platforms
Cons: can only be used with Adaptall lenses

This is a well built TC and light weight. It doesn't add much length to the lens either. It has an adjusted f-stop guide. I use it mainly with the Tamron SP 180mm 60B lens.
Inactive Account

Registered: September, 2006
Location: D/FW area, Tx.
Posts: 1,712
Lens Review Date: April 2, 2008 I can recommend this lens: Yes | Price: $90.00 | Rating: 9 

Pros: sharp and light
Cons: can only be used on tamron adaptall lenses

i found this TC to be as sharper or sharper than my smcA1.4x-s.. i'd recommend it highly.
the $90 was for all 3 of the SP TCs.
Add Review of Tamron  Adaptall 140F 1.4X TC

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