Zoom lens, lens barrel, and imaging apparatus

A zoom lens comprising:

• a first lens group having a positive refractive power;
• a second lens group having a negative refractive power;
• and
• a rear group, sequentially from an object side, wherein
• intervals between adjacent lens groups are configured to vary when changing magnification from a short focal length end to a long focal length end,
• the rear group includes at least one lens group having a negative refractive power, and at least one lens group having a positive refractive power,
• a lens group having a highest negative refractive power among the at least one lens group having the negative refractive power included in the rear group is a focusing lens group GF configured to move toward an image side when focusing from infinity to a close range,
• a lens group GFF having a positive refractive power and arranged adjacent to an object side of the focusing lens group GF among the at least one lens group having the positive refractive power included in the rear group includes a positive lens component L1 positioned on a most image side,
• the positive lens component L1 includes a positive lens L1P, and
• a conditional expression (1) is satisfied,
• 1.85<NdL1P (1)
• where
• NdL1P:
• a refractive index of the positive lens L1P,
• wherein
• the focusing lens group GF includes at least one negative lens and at least one positive lens, and
• a conditional expression (13) is satisfied,
• −10<fGFP/fGFN<−0.5 (13)
• where
• fGFP:
• a focal length of a positive lens GFP having a lowest Abbe number among positive lenses included in the focusing lens group GF;
• and
• fGFN:
• a focal length of a negative lens GFN having a highest Abbe number among negative lenses included in the focusing lens GF.

A zoom lens comprising:

• a first lens group having a positive refractive power;
• a second lens group having a negative refractive power;
• and
• a rear group, sequentially from an object side, wherein
• intervals between adjacent lens groups are configured to vary when changing magnification from a short focal length end to a long focal length end,
• the rear group includes at least one lens group having a negative refractive power, and at least one lens group having a positive refractive power,
• a lens group having a highest negative refractive power among the at least one lens group having the negative refractive power included in the rear group is a focusing lens group GF configured to move toward an image side when focusing from infinity to a close range,
• a lens group GFF having a positive refractive power and arranged adjacent to an object side of the focusing lens group GF among the at least one lens group having the positive refractive power included in the rear group includes a positive lens component L1 positioned on a most image side,
• the positive lens component L1 includes a positive lens L1P, and
• a conditional expression (1) is satisfied,
• 1.85<NdL1P (1)
• where
• NdL1P:
• a refractive index of the positive lens L1P, and
• a conditional expression (17′) is satisfied,
• 3.5<|(1−M_GFT2)×M_GFRT2| (17′)
• where
• M_GFT:
• lateral magnification of the focusing lens group GF when focusing on infinity at a long focal length end, and
• M_GFRT:
• combined lateral magnification of all of the lens groups arranged on the image side relative to the focusing lens group GF when focusing on infinity at a long focal length end.