As I said, that is the simple explanation. You can dig as deep into it as you wish.
Here is a table of Tag ID's for Canon, your Tamron lens may send 37.1. It then should be recognized.
Canon LensType Values
Decimal values differentiate lenses which would otherwise have the same LensType, and are used by the Composite LensID tag when attempting to identify the specific lens model.
Value LensType
1 = Canon EF 50mm f/1.8
2 = Canon EF 28mm f/2.8
3 = Canon EF 135mm f/2.8 Soft
4 = Canon EF 35-105mm f/3.5-4.5 or Sigma Lens
4.1 = Sigma UC Zoom 35-135mm f/4-5.6
5 = Canon EF 35-70mm f/3.5-4.5
6 = Canon EF 28-70mm f/3.5-4.5 or Sigma or Tokina Lens
6.1 = Sigma 18-50mm f/3.5-5.6 DC
6.2 = Sigma 18-125mm f/3.5-5.6 DC IF ASP
6.3 = Tokina AF193-2 19-35mm f/3.5-4.5
6.4 = Sigma 28-80mm f/3.5-5.6 II Macro
7 = Canon EF 100-300mm f/5.6L
8 = Canon EF 100-300mm f/5.6 or Sigma or Tokina Lens
8.1 = Sigma 70-300mm f/4-5.6 [APO] DG Macro
8.2 = Tokina AT-X242AF 24-200mm f/3.5-5.6
9 = Canon EF 70-210mm f/4
9.1 = Sigma 55-200mm f/4-5.6 DC
10 = Canon EF 50mm f/2.5 Macro or Sigma Lens
10.1 = Sigma 50mm f/2.8 EX
10.2 = Sigma 28mm f/1.8
10.3 = Sigma 105mm f/2.8 Macro EX
10.4 = Sigma 70mm f/2.8 EX DG Macro EF
11 = Canon EF 35mm f/2
13 = Canon EF 15mm f/2.8 Fisheye
14 = Canon EF 50-200mm f/3.5-4.5L
15 = Canon EF 50-200mm f/3.5-4.5
16 = Canon EF 35-135mm f/3.5-4.5
17 = Canon EF 35-70mm f/3.5-4.5A
18 = Canon EF 28-70mm f/3.5-4.5
20 = Canon EF 100-200mm f/4.5A
21 = Canon EF 80-200mm f/2.8L
22 = Canon EF 20-35mm f/2.8L or Tokina Lens
22.1 = Tokina AT-X280AF PRO 28-80mm f/2.8 Aspherical
23 = Canon EF 35-105mm f/3.5-4.5
24 = Canon EF 35-80mm f/4-5.6 Power Zoom
25 = Canon EF 35-80mm f/4-5.6 Power Zoom
26 = Canon EF 100mm f/2.8 Macro or Other Lens
26.1 = Cosina 100mm f/3.5 Macro AF
26.2 = Tamron SP AF 90mm f/2.8 Di Macro
26.3 = Tamron SP AF 180mm f/3.5 Di Macro
26.4 = Carl Zeiss Planar T* 50mm f/1.4
27 = Canon EF 35-80mm f/4-5.6
28 = Canon EF 80-200mm f/4.5-5.6 or Tamron Lens
28.1 = Tamron SP AF 28-105mm f/2.8 LD Aspherical IF
28.2 = Tamron SP AF 28-75mm f/2.8 XR Di LD Aspherical [IF] Macro
28.3 = Tamron AF 70-300mm f/4.5-5.6 Di LD 1:2 Macro Zoom
28.4 = Tamron AF Aspherical 28-200mm f/3.8-5.6
29 = Canon EF 50mm f/1.8 II
30 = Canon EF 35-105mm f/4.5-5.6
31 = Canon EF 75-300mm f/4-5.6 or Tamron Lens
31.1 = Tamron SP AF 300mm f/2.8 LD IF
32 = Canon EF 24mm f/2.8 or Sigma Lens
32.1 = Sigma 15mm f/2.8 EX Fisheye
33 = Voigtlander or Zeiss Lens
33.1 = Voigtlander Ultron 40mm f/2 SLII Aspherical
33.2 = Zeiss Distagon 35mm T* f/2 ZE
35 = Canon EF 35-80mm f/4-5.6
36 = Canon EF 38-76mm f/4.5-5.6
37 = Canon EF 35-80mm f/4-5.6 or Tamron Lens
37.1 = Tamron 70-200mm f/2.8 Di LD IF Macro
37.2 = Tamron AF 28-300mm f/3.5-6.3 XR Di VC LD Aspherical [IF] Macro Model A20
37.3 = Tamron SP AF 17-50mm f/2.8 XR Di II VC LD Aspherical [IF]
37.4 = Tamron AF 18-270mm f/3.5-6.3 Di II VC LD Aspherical [IF] Macro
38 = Canon EF 80-200mm f/4.5-5.6
39 = Canon EF 75-300mm f/4-5.6
40 = Canon EF 28-80mm f/3.5-5.6
41 = Canon EF 28-90mm f/4-5.6
42 = Canon EF 28-200mm f/3.5-5.6 or Tamron Lens
42.1 = Tamron AF 28-300mm f/3.5-6.3 XR Di VC LD Aspherical [IF] Macro Model A20
43 = Canon EF 28-105mm f/4-5.6
44 = Canon EF 90-300mm f/4.5-5.6
45 = Canon EF-S 18-55mm f/3.5-5.6 [II]
46 = Canon EF 28-90mm f/4-5.6
48 = Canon EF-S 18-55mm f/3.5-5.6 IS
49 = Canon EF-S 55-250mm f/4-5.6 IS
50 = Canon EF-S 18-200mm f/3.5-5.6 IS
51 = Canon EF-S 18-135mm f/3.5-5.6 IS
52 = Canon EF-S 18-55mm f/3.5-5.6 IS II
94 = Canon TS-E 17mm f/4L
95 = Canon TS-E 24.0mm f/3.5 L II
124 = Canon MP-E 65mm f/2.8 1-5x Macro Photo
125 = Canon TS-E 24mm f/3.5L
126 = Canon TS-E 45mm f/2.8
127 = Canon TS-E 90mm f/2.8
129 = Canon EF 300mm f/2.8L
130 = Canon EF 50mm f/1.0L
131 = Canon EF 28-80mm f/2.8-4L or Sigma Lens
131.1 = Sigma 8mm f/3.5 EX DG Circular Fisheye
131.2 = Sigma 17-35mm f/2.8-4 EX DG Aspherical HSM
131.3 = Sigma 17-70mm f/2.8-4.5 DC Macro
131.4 = Sigma APO 50-150mm f/2.8 [II] EX DC HSM
131.5 = Sigma APO 120-300mm f/2.8 EX DG HSM
132 = Canon EF 1200mm f/5.6L
134 = Canon EF 600mm f/4L IS
135 = Canon EF 200mm f/1.8L
136 = Canon EF 300mm f/2.8L
137 = Canon EF 85mm f/1.2L or Sigma or Tamron Lens
137.1 = Sigma 18-50mm f/2.8-4.5 DC OS HSM
137.2 = Sigma 50-200mm f/4-5.6 DC OS HSM
137.3 = Sigma 18-250mm f/3.5-6.3 DC OS HSM
137.4 = Sigma 24-70mm f/2.8 IF EX DG HSM
137.5 = Sigma 18-125mm f/3.8-5.6 DC OS HSM
137.6 = Sigma 17-70mm f/2.8-4 DC Macro OS HSM
137.7 = Tamron AF 18-270mm f/3.5-6.3 Di II VC PZD
138 = Canon EF 28-80mm f/2.8-4L
139 = Canon EF 400mm f/2.8L
140 = Canon EF 500mm f/4.5L
141 = Canon EF 500mm f/4.5L
142 = Canon EF 300mm f/2.8L IS
143 = Canon EF 500mm f/4L IS
144 = Canon EF 35-135mm f/4-5.6 USM
145 = Canon EF 100-300mm f/4.5-5.6 USM
146 = Canon EF 70-210mm f/3.5-4.5 USM
147 = Canon EF 35-135mm f/4-5.6 USM
148 = Canon EF 28-80mm f/3.5-5.6 USM
149 = Canon EF 100mm f/2 USM
150 = Canon EF 14mm f/2.8L or Sigma Lens
150.1 = Sigma 20mm EX f/1.8
150.2 = Sigma 30mm f/1.4 DC HSM
150.3 = Sigma 24mm f/1.8 DG Macro EX
151 = Canon EF 200mm f/2.8L
152 = Canon EF 300mm f/4L IS or Sigma Lens
152.1 = Sigma 12-24mm f/4.5-5.6 EX DG ASPHERICAL HSM
152.2 = Sigma 14mm f/2.8 EX Aspherical HSM
152.3 = Sigma 10-20mm f/4-5.6
152.4 = Sigma 100-300mm f/4
153 = Canon EF 35-350mm f/3.5-5.6L or Sigma or Tamron Lens
153.1 = Sigma 50-500mm f/4-6.3 APO HSM EX
153.2 = Tamron AF 28-300mm f/3.5-6.3 XR LD Aspherical [IF] Macro
153.3 = Tamron AF 18-200mm f/3.5-6.3 XR Di II LD Aspherical [IF] Macro Model A14
153.4 = Tamron 18-250mm f/3.5-6.3 Di II LD Aspherical [IF] Macro
154 = Canon EF 20mm f/2.8 USM
155 = Canon EF 85mm f/1.8 USM
156 = Canon EF 28-105mm f/3.5-4.5 USM or Tamron Lens
156.1 = Tamron SP 70-300mm f/4.0-5.6 Di VC USD
160 = Canon EF 20-35mm f/3.5-4.5 USM or Tamron or Tokina Lens
160.1 = Tamron AF 19-35mm f/3.5-4.5
160.2 = Tokina AT-X 124 AF 12-24mm f/4 DX
161 = Canon EF 28-70mm f/2.8L or Sigma or Tamron Lens
161.1 = Sigma 24-70mm f/2.8 EX
161.2 = Sigma 28-70mm f/2.8 EX
161.3 = Tamron AF 17-50mm f/2.8 Di-II LD Aspherical
161.4 = Tamron 90mm f/2.8
162 = Canon EF 200mm f/2.8L
163 = Canon EF 300mm f/4L
164 = Canon EF 400mm f/5.6L
165 = Canon EF 70-200mm f/2.8 L
166 = Canon EF 70-200mm f/2.8 L + 1.4x
167 = Canon EF 70-200mm f/2.8 L + 2x
168 = Canon EF 28mm f/1.8 USM
169 = Canon EF 17-35mm f/2.8L or Sigma Lens
169.1 = Sigma 18-200mm f/3.5-6.3 DC OS
169.2 = Sigma 15-30mm f/3.5-4.5 EX DG Aspherical
169.3 = Sigma 18-50mm f/2.8 Macro
169.4 = Sigma 50mm f/1.4 EX DG HSM
169.5 = Sigma 85mm f/1.4 EX DG HSM
170 = Canon EF 200mm f/2.8L II
171 = Canon EF 300mm f/4L
172 = Canon EF 400mm f/5.6L
173 = Canon EF 180mm Macro f/3.5L or Sigma Lens
173.1 = Sigma 180mm EX HSM Macro f/3.5
173.2 = Sigma APO Macro 150mm f/2.8 EX DG HSM
174 = Canon EF 135mm f/2L or Sigma Lens
174.1 = Sigma 70-200mm f/2.8 EX DG APO OS HSM
175 = Canon EF 400mm f/2.8L
176 = Canon EF 24-85mm f/3.5-4.5 USM
177 = Canon EF 300mm f/4L IS
178 = Canon EF 28-135mm f/3.5-5.6 IS
179 = Canon EF 24mm f/1.4L
180 = Canon EF 35mm f/1.4L
181 = Canon EF 100-400mm f/4.5-5.6L IS + 1.4x
182 = Canon EF 100-400mm f/4.5-5.6L IS + 2x
183 = Canon EF 100-400mm f/4.5-5.6L IS
184 = Canon EF 400mm f/2.8L + 2x
185 = Canon EF 600mm f/4L IS
186 = Canon EF 70-200mm f/4L
187 = Canon EF 70-200mm f/4L + 1.4x
188 = Canon EF 70-200mm f/4L + 2x
189 = Canon EF 70-200mm f/4L + 2.8x
190 = Canon EF 100mm f/2.8 Macro
191 = Canon EF 400mm f/4 DO IS
193 = Canon EF 35-80mm f/4-5.6 USM
194 = Canon EF 80-200mm f/4.5-5.6 USM
195 = Canon EF 35-105mm f/4.5-5.6 USM
196 = Canon EF 75-300mm f/4-5.6 USM
197 = Canon EF 75-300mm f/4-5.6 IS USM
198 = Canon EF 50mm f/1.4 USM
199 = Canon EF 28-80mm f/3.5-5.6 USM
200 = Canon EF 75-300mm f/4-5.6 USM
201 = Canon EF 28-80mm f/3.5-5.6 USM
202 = Canon EF 28-80mm f/3.5-5.6 USM IV
208 = Canon EF 22-55mm f/4-5.6 USM
209 = Canon EF 55-200mm f/4.5-5.6
210 = Canon EF 28-90mm f/4-5.6 USM
211 = Canon EF 28-200mm f/3.5-5.6 USM
212 = Canon EF 28-105mm f/4-5.6 USM
213 = Canon EF 90-300mm f/4.5-5.6 USM
214 = Canon EF-S 18-55mm f/3.5-5.6 USM
215 = Canon EF 55-200mm f/4.5-5.6 II USM
224 = Canon EF 70-200mm f/2.8L IS
225 = Canon EF 70-200mm f/2.8L IS + 1.4x
226 = Canon EF 70-200mm f/2.8L IS + 2x
227 = Canon EF 70-200mm f/2.8L IS + 2.8x
228 = Canon EF 28-105mm f/3.5-4.5 USM
229 = Canon EF 16-35mm f/2.8L
230 = Canon EF 24-70mm f/2.8L
231 = Canon EF 17-40mm f/4L
232 = Canon EF 70-300mm f/4.5-5.6 DO IS USM
233 = Canon EF 28-300mm f/3.5-5.6L IS
234 = Canon EF-S 17-85mm f4-5.6 IS USM
235 = Canon EF-S 10-22mm f/3.5-4.5 USM
236 = Canon EF-S 60mm f/2.8 Macro USM
237 = Canon EF 24-105mm f/4L IS
238 = Canon EF 70-300mm f/4-5.6 IS USM
239 = Canon EF 85mm f/1.2L II
240 = Canon EF-S 17-55mm f/2.8 IS USM
241 = Canon EF 50mm f/1.2L
242 = Canon EF 70-200mm f/4L IS
243 = Canon EF 70-200mm f/4L IS + 1.4x
244 = Canon EF 70-200mm f/4L IS + 2x
245 = Canon EF 70-200mm f/4L IS + 2.8x
246 = Canon EF 16-35mm f/2.8L II
247 = Canon EF 14mm f/2.8L II USM
248 = Canon EF 200mm f/2L IS
249 = Canon EF 800mm f/5.6L IS
250 = Canon EF 24 f/1.4L II
251 = Canon EF 70-200mm f/2.8L IS II USM
254 = Canon EF 100mm f/2.8L Macro IS USM
488 = Canon EF-S 15-85mm f/3.5-5.6 IS USM
Where in the Canon page does it mention the issue with Tamron lenses? I have the 17-50 F2.8 VC which was faulty in the first place however this just compounds the issue.
Precisely my point Cornell. The Canon Page does not mention Tamron Lenses. Now I am not sure if it necessarily has to mention them however it chooses not to and only mentions their lenses. I have written to Tamron Service Dept in the UK with links to this site and await a response although I am not holding my breath. I had my lens with them over Xmas/New Year so I am not sure if they will have made the modification required at that point when they were checking the lens over.
I had two issues with the Tamron 17-50 VC on my 50D.
1) the outer AF points did not work reliably
2) there was an intermittent Err.001
I sent the lens to Tamron, from there it went to a subcontracted service company. 1st time it came back from 'repair', no change was visible. I complained and sent it there a 2nd time. The technician called me and said he can not find any problem. I told him that the Err.001 with this lens is according to a lot of posts on several groups an issue with the diapragm and that the AF issue is a problem with the Lens ID.
He said he does not believe in the wisdom of users of such groups. I told him to call Tamron then. He did, got the same info, replaced the diaphragm mechanism and loaded a new firmware with changed LensID. The lens works flawless ever since. It is now a very, very good and reliable tool, best value for money in this class.
So, at least for some of the lenses with the LensID problem, there is a solution. Of course it is not provided by Canon.
I have the Tamron 17-50 VC on EOS7D and seem to experience this problem with outer focus sensors.
Tamron in Australia seems to have no knowledge whatever of the issue and wants to charge me for a repair.
Does anybody have any official information from Tamron (a web link would be especially useful) in which they acknowledge the issue and offer/propose a solution? It's all very well for Canon to say what they have said, but to get my issue addressed, I think Tamron also needs to come to the party.
I have the Tamron 17-50 VC on EOS7D and seem to experience this problem with outer focus sensors.
Tamron in Australia seems to have no knowledge whatever of the issue and wants to charge me for a repair.
Does anybody have any official information from Tamron (a web link would be especially useful) in which they acknowledge the issue and offer/propose a solution? It's all very well for Canon to say what they have said, but to get my issue addressed, I think Tamron also needs to come to the party.
only outer focus sensor affected?
mostly I only use the center one
I want to buy a Tarmron A001 70-200/2.8, but dpreview said there are alway miss focus on canon body
Is this a good deal?
or should I have to buy canon 70-200 which is more expensive..
