trying to set up DSLR as webcam

following the instructions from here 
https://www.crackedthecode.co/how-to-use-your-dslr-as-a-webcam-in-linux/

the terminal sees the camera; but not in the detail the article would like;


"0.000047 main                        (2): ALWAYS INCLUDE THE FOLLOWING 
LINES WHEN SENDING DEBUG MESSAGES TO THE MAILING LIST:
0.000075 main                        (2): gphoto2 2.5.23
0.000098 main                        (2): gphoto2 has been compiled with 
the following options:
0.000100 main                        (2):  + gcc (C compiler used)
0.000103 main                        (2):  + popt (mandatory, for 
handling command-line parameters)
0.000121 main                        (2):  + exif (for displaying EXIF 
information)
0.000123 main                        (2):  + cdk (for accessing 
configuration options)
0.000126 main                        (2):  + aa (for displaying live 
previews)
0.000128 main                        (2):  + jpeg (for displaying live 
previews in JPEG format)
0.000130 main                        (2):  + readline (for easy 
navigation in the shell)
0.000156 main                        (2): libgphoto2 2.5.25
0.000160 main                        (2): libgphoto2 has been compiled 
with the following options:
0.000163 main                        (2):  + standard camlib set 
SKIPPING SOME (ax203 canon digigr8 dimagev directory jl2005a jl2005c 
kodak_dc240 mars pentax ptp2 ricoh_g3 sierra sonix sq905 st2205 topfield 
tp6801 SKIPPING lumix)
0.000166 main                        (2):  + gcc (C compiler used)
0.000168 main                        (2):  + ltdl (for portable loading 
of camlibs)
0.000189 main                        (2):  + EXIF (for special handling 
of EXIF files)
0.000194 main                        (2): libgphoto2_port 0.12.0
0.000212 main                        (2): libgphoto2_port has been 
compiled with the following options:
0.000215 main                        (2):  + iolibs: disk ptpip serial 
usb1 usbdiskdirect usbscsi
0.000218 main                        (2):  + gcc (C compiler used)
0.000220 main                        (2):  + ltdl (for portable loading 
of iolibs)
0.000223 main                        (2):  + EXIF (for vusb)
0.000226 main                        (2):  + USB (libusb1, for USB cameras)
0.000228 main                        (2):  + serial (for serial cameras)
0.000247 main                        (2):  + no resmgr (serial port 
access and locking)
0.000249 main                        (2):  + no ttylock (serial port 
locking)
0.000252 main                        (2):  + no lockdev (serial port 
locking)
0.000254 main                        (2): CAMLIBS env var not set, using 
compile-time default instead
0.000257 main                        (2): IOLIBS env var not set, using 
compile-time default instead
0.000260 main                        (2): invoked with following arguments:
0.000262 main                        (2):   --debug
0.000270 load_settings               (2): Creating gphoto config 
directory ('/home/dad/.gphoto')
0.000300 load_settings               (2): Loading settings from file 
'/home/dad/.gphoto/settings'.
0.000346 gp_camera_free              (2): Freeing camera...
0.000349 gp_port_free                (2): Freeing port...
0.000353 gp_filesystem_reset         (2): resetting filesystem
0.000355 gp_filesystem_lru_clear     (2): Clearing fscache LRU list...
0.000358 gp_filesystem_lru_clear     (2): fscache LRU list already empty
0.000361 delete_all_folders          (2): Internally deleting all 
folders from '/'...
0.000364 lookup_folder               (2): Lookup folder '/'...
0.000367 lookup_folder               (2): Found! / is 0x5576cc1ff800
0.000370 recurse_delete_folder       (2): Recurse delete folder 
0x5576cc1ff800//
0.000373 delete_all_files            (2): Delete all files in folder 
0x5576cc1ff800//
"

the entry in the terminal recommended running what is detailed below: I 
get told "no camera detected"

env LANG=C gphoto2 --debug --debug-logfile=my-logfile.txt --summary
*** Error: No camera found. ***


all best wishes, Peter




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