DOF and the use of extenders
If i shoot my 400 mm f 2.8 at f 4, adding a 1.4X makes it an f 4. Is the depth of field the same with and without the extender at f 4?
Posts
Canon 15mm Fisheye F2.8 Focus Problem
Hello All, I have about 5 year old 15mm Fisheye lens. i dropped it couple of times. nothing broke but kind stopped focusing with manual focus point selection. if i put my camera to auto focus select it focus at random spots. i am cps member and can s...
what is the best tel-extender to use with my T1i?
would love to improve my distance capabilities...
2x Doubler
Bummer. Have a 1st generatioon 2x that I successfully use on my 70-200 2.8-IS F lens. Visiting my brother who has a100 - 500 F series & I couldn't wait to play with his lens & my doubler. He lives on the country and there's lots of wildlife. Does...
Resolved! "The next lens to buy"
Hi I am looking to buy "the next lens" . Preferably a macro lens but i am confused. I currently have a 18-55mm and 50mm lens. I mostly capture landscapes and flowers. TksZinta
Best Lens Hood for 40 2.8 STM
Not in my opinion the one designed for this lens, a hood is made to stop flare not just to say I´m a lens hood.Planning to use the one designed for the 50 1.8 the Canon ES-62 , It might destroy the low profile but ona APS-C Sensor Does what a lens h...
Close-up lens vs extension tube for EF70-300 F4.5-5.6 DO IS USM
I hate to change lenses while hiking because of dust, etc. and time to do it (The bird will have flown if I want to use max telephoto). In addition to birds and critters, I also like to photograph flowers. So there are two ways to allow me to get c...
AF Microadjustment
Has anyone had any problems with the Microfocus adjustment point drifting dependent on the temperature?This happens on my 600mm lens alot.
I have a Sigma APO 170-500mm, 1:5-6.3 lens. Is it worth getting fixed?
The aperature is stuck at about 5.0. It fits both my EOS 10D and my EOS Rebel T3. Is it worth getting fixed or is my money better spent on a new lens?
12mm extension tube with a 24mm T-S lens for macro photography
How do you use a 12mm tube with a 24mm T-S for macro? Do you focus somewhere, and then tilt? Is shifting used?
Telephoto lens
What lens is recommended for wildlife shots? I currently have a 250mm but would like something that can get closer. I am looking at the 400 but have never used one so I do not know if that will be enough. My shots are usually 100-200 yards away.
EF 70-300mm f/4-5.6 IS USM lens.
I have a 60D camera and I just purchased the EF 70-300mm f/4-5.6 IS USM lens because I thought it might be a good addition to give me a bit more reach than my 18-135mm. I noticed, in AF, the zoom will not fully retract. If I switch to MF I can retrac...
Canon EF 70-300mm f/4-5.6 IS USM Lens flex cable clearance question
Looking at the picture can anyone else with the same lens a Canon EF 70-300mm f/4-5.6 IS USM Lens confirm that their lens has the same internal flex cable routed in the same manner? Mine is apparently contacting the plastic tab and I am concerned tha...
Cap'n 100m L lens
Why won't my 100mm W/ macro (L lens) stay focused on close ups. I have the IS-off and the focus on manual. After focusing, the focus mechanism acts like it is searching and goes in and out of focus and does not settle on anything.
sharpness issues with my canon. Not sure which lens would be best for video.
I have several lenses and I use the tamron 17-50. My issue is that even though I do use manual focus, I don't seemto get a very clear picture even with stills. I even went inside canon to adjust the forcus and I am getting the same results. I ha...
