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According to this answerthis answer, parfocal lenses (lenses that can zoom in/out without losing focus) are relatively rare and more expensive.

However, the original poster's kit-lens is parfocal. Additionally, the kit-lens that came with my Sony a390 and the kit lens with my brother's Nikon D3200 (both entry-level DSLR's, with presumably cheapo kit-lenses) are parfocal as well.

Does anyone know why, if this is a feature primarily of expensive lenses, so many cheapo kit-lenses seem to support it? What features of the lens cause it to be parfocal or not?

According to this answer, parfocal lenses (lenses that can zoom in/out without losing focus) are relatively rare and more expensive.

However, the original poster's kit-lens is parfocal. Additionally, the kit-lens that came with my Sony a390 and the kit lens with my brother's Nikon D3200 (both entry-level DSLR's, with presumably cheapo kit-lenses) are parfocal as well.

Does anyone know why, if this is a feature primarily of expensive lenses, so many cheapo kit-lenses seem to support it? What features of the lens cause it to be parfocal or not?

According to this answer, parfocal lenses (lenses that can zoom in/out without losing focus) are relatively rare and more expensive.

However, the original poster's kit-lens is parfocal. Additionally, the kit-lens that came with my Sony a390 and the kit lens with my brother's Nikon D3200 (both entry-level DSLR's, with presumably cheapo kit-lenses) are parfocal as well.

Does anyone know why, if this is a feature primarily of expensive lenses, so many cheapo kit-lenses seem to support it? What features of the lens cause it to be parfocal or not?

Tweeted twitter.com/#!/StackPhotos/status/325697467632975872
parifocal -> parfocal
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Caleb
Caleb
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Why are so many kit-lenses parifocal,parfocal if it's an expensive feature?

According to this answer, parifocalparfocal lenses (lenses that can zoom in/out without losing focus) are relatively rare and more expensive.

However, the original poster's kit-lens is parifocalparfocal. Additionally, the kit-lens that came with my Sony a390 and the kit lens with my brother's Nikon D3200 (both entry-level DSLR's, with presumably cheapo kit-lenses) are parifocalparfocal as well.

Does anyone know why, if this is a feature primarily of expensive lenses, so many cheapo kit-lenses seem to support it? What features of the lens cause it to be parifocalparfocal or not?

Why are so many kit-lenses parifocal, if it's an expensive feature?

According to this answer, parifocal lenses (lenses that can zoom in/out without losing focus) are relatively rare and more expensive.

However, the original poster's kit-lens is parifocal. Additionally, the kit-lens that came with my Sony a390 and the kit lens with my brother's Nikon D3200 (both entry-level DSLR's, with presumably cheapo kit-lenses) are parifocal as well.

Does anyone know why, if this is a feature primarily of expensive lenses, so many cheapo kit-lenses seem to support it? What features of the lens cause it to be parifocal or not?

Why are so many kit-lenses parfocal if it's an expensive feature?

According to this answer, parfocal lenses (lenses that can zoom in/out without losing focus) are relatively rare and more expensive.

However, the original poster's kit-lens is parfocal. Additionally, the kit-lens that came with my Sony a390 and the kit lens with my brother's Nikon D3200 (both entry-level DSLR's, with presumably cheapo kit-lenses) are parfocal as well.

Does anyone know why, if this is a feature primarily of expensive lenses, so many cheapo kit-lenses seem to support it? What features of the lens cause it to be parfocal or not?

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BlueRaja - Danny Pflughoeft
BlueRaja - Danny Pflughoeft
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Why are so many kit-lenses parifocal, if it's an expensive feature?

According to this answer, parifocal lenses (lenses that can zoom in/out without losing focus) are relatively rare and more expensive.

However, the original poster's kit-lens is parifocal. Additionally, the kit-lens that came with my Sony a390 and the kit lens with my brother's Nikon D3200 (both entry-level DSLR's, with presumably cheapo kit-lenses) are parifocal as well.

Does anyone know why, if this is a feature primarily of expensive lenses, so many cheapo kit-lenses seem to support it? What features of the lens cause it to be parifocal or not?