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 POLAND LENS MIKAR S 45 55 M39 759  US $12.99
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 Kiev 88 Medium Format SLR Film Camera Original Lens MC Volna 3 US $138.83
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 Beseler ColorPro Enlarging Lens Screw Mount 128 50 US $39.99
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A 2cm tall candle is 10.9cm from a converging lens that has a focal length of 7.40cm.?
How far from the lens will the image be?Is the image real or virtual,and either reduced,enlarged,or same size as object?What is the height of the image?
See the ref. The applicable formula for distance is 1/S1 + 1/S2 = 1/f, where S1 and S2 are object and image distances and f is the focal length. With S1=10.9 and f= 7.4 this gives S2=23.045 cm. The magnification M = -S2/S1 = -2.114, so the image is enlarged (abs(M)>1), and with negative magnification, inverted. Knowing the magnification you can calculate the height of the image. Since S2 is positive the image is real.
What's important is keeping the signs of S1 and S2 straight. A positive S1 is on one side of the lens and a positive S2 on the other side. This of course means the image is projected (rather than seen by looking through the lens in the direction of the object) and therefore is real. Also f is negative for a diverging lens and positive for converging.
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POLAND LENS MIKAR S 45 55 M39 759 US $12.99
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Kiev 88 Medium Format SLR Film Camera Original Lens MC Volna 3 US $138.83
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Beseler ColorPro Enlarging Lens Screw Mount 128 50 US $39.99
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 Nikon Lens Camcorder CP 2 50mm Excellent No Reserve US $.99
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 Nikon 55mm f35 lens micro Nikkor non Ai F US $118.74
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 Nikon 55mm f35 lens micro Nikkor Ai manual focus user US $118.74
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 Nikon 55mm f35 lens micro Nikkor Ai manual focus US $128.24
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 Russian lens for enlarger Industar 23U f 45 110mm M39 US $4.99
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 WOLLENSEK VELOSTIGMAT 3 1 4 FOCUS F 45 ENLARGING LENS US $9.99
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 VEGA 11U 28 50mm Enlarger Russian Soviet USSR Lens US $19.99
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 VEGA 11U 28 50 Enlarger Russian Lens Macro M39 FED ZORKI LEICA LTM BOX EXC US $19.99
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 Nikon Micro Nikkor P 55 mm f 35 non AI Lens US $20.50
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 Rodenstock Rodagon 240mm f56 Enlarging Lens PRICE REDUCED US $169.00
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 25x Telephoto lens 305mm filter mount tele lense US $14.94
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 SCHNEIDER KREUZNACH COMPONON 50mm f 4 LENS W MOUNT GERMANY US $50.00
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 Enlarging Raptar Wollensak 162mm f 45 Camera Lens US $9.99
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 Nikon Micro Nikkor P Auto 135 f55mm for F FM3 F3 FM2 FA FE D700 and D series US $120.00
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 EL Nikkor 105mm 80mm f56 Enlarging Lens US $22.39
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 EL Nikkor 50mm f 28 Enlarging Lens US $1.31
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 Nikon Micro NIKKOR 55 mm F 35 Lens US $7.50
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 Kodak Ektanar Close Up Lens 10 7 with Lens adapter 43MM Threads US $6.00
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 Carl Zeiss Jena Tessar f 5cm 50mm 135 w lensboard US $19.99
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 AMAR S 45 105 PZO Poland Macro S Lens M42 Enlarger US $24.99
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 VOSS 50mm F 35 Enlarging Lens Used US $39.50
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 WOLLENSAK ENLARGING RAPTAR LENS 90mm f 45 US $40.00
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 RODENSTOCK YSARON GERMANY 1 45 F 105 MM LARGE FORMAT CAMERA OR ENLARGER LENS US $47.77
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 Nikon Micro Nikkor P Auto 55mm F 35 Non AI Lens US $69.00
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 Nikon Rodagon WA 40mm f4 LOOK US $99.00
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 VINTAGE CAMERA LENS KODAK LONDON 3 in 75mm ENLARGING EKTAR F 45 39mm THREAD US $15.86
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 Ansco Viking lens f63 working clean on round board US $31.00
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 Meopta BELAR 145 75mm Enlarging Lens with great holder US $60.00
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 Meopta BELAR 145 75mm Enlarging Lens with practical holder US $60.00
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 BESLAR f 35 50mm Enlarger Lens Model 8670 US $19.99
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